Traditional souvlaki is, of course, meat grilled on skewers. This version of one of my favorite recipes is perfect for those times when you can’t get to the grill but want to taste souvlaki’s deep, rich spices. Besides the traditional way of serving souvlaki on a pita with tzatziki sauce, this chicken is delicious over rice with a side of tomatoes and cucumber and my light, minty yogurt dressing.
Ingredients
For the chicken:
4 tablespoons extra virgin olive oil, divided use
Juice of 1 large lemon
4 garlic cloves, very finely minced
1 teaspoon coarse sea salt
1 teaspoon freshly ground black pepper
1 teaspoon ground cumin
1 teaspoon ground coriander
1 teaspoon allspice
2 teaspoons sweet paprika
1/2 teaspoon cayenne
1/2 teaspoon turmeric
2 pounds boneless, skinless chicken thighs
2 large red onions, peeled and cut into eighths
For the yogurt dressing:
1 cup plain Greek yogurt
1 tablespoon lemon juice, more to taste
2 tablespoons extra virgin olive oil, plus more for drizzling
2 garlic cloves, finely minced
1/4 teaspoon sea salt
2 tablespoons chopped fresh dill
2 tablespoons chopped fresh spearmint
Directions
Step 1
In a bowl large enough to hold the chicken, make a marinade by whisking together 2 tablespoons olive oil, the lemon juice, garlic, salt, and all the spices.
Step 2
Using a cutting board reserved for raw meat, cut the thighs into evenly sized strips. Place the strips in the marinade and toss to coat. Allow the chicken to marinate on a counter for 30 minutes, or up to overnight in the fridge.
Step 3
When ready to cook, preheat your oven to 350°F. Use a tablespoon of olive oil to lightly coat a rimmed sheet pan. Spread out the strips. Drizzle the onions with olive oil and arrange them among the chicken pieces. Bake for 30 minutes or until an instant-read thermometer reaches 165°F when testing a few chicken strips.
Step 4
While the chicken is roasting, make the yogurt dressing by whisking together all its ingredients. Taste and add more salt, pepper, and/or lemon juice if desired. (If you want to make the sauce in advance, keep it in the fridge until needed). Just before serving, drizzle the top with more olive oil.
Step 5
To serve, plate strips of chicken with the red onions along with the yogurt dressing and your choice of sides or pitas.
Salmon Bowl Recipe (Made Simple), Spotlight on Sesame Seeds, Thawing Frozen Fish, Why Wild Seafood is Best, and Counting Your Biological Age
Americans still don’t eat enough fish, and the challenge of finding quality fresh seafood is one of the reasons. My DIY salmon bowl recipe is a great way to get the goodness of salmon plus as many veggies as you’d like to include. Read on to see why frozen is actually preferred—unless of course you live near a fishing dock! Then find out about advances in measuring biological aging, a metric that makes your chronological age less important.
Poke bowls are still very popular, but it’s not always easy to buy the sushi-grade tuna needed to make your own. This variation includes sautéed chunks of salmon instead of ahi. The technique is also great if you like tuna but prefer it cooked. I’ve suggested many veggies to fill up your bowl, but have fun choosing other ingredients—be guided by what’s most fresh at your market.
Ingredients
For the fish:
1 pound skinless salmon fillet, wild caught if possible
1 tablespoon regular or reduced-sodium soy sauce
1 tablespoon sesame oil
1 tablespoon rice vinegar
3 tablespoons extra virgin olive oil, divided use
For the spicy mayo:
1/4 cup best-quality mayonnaise
1 tablespoon extra virgin olive oil
1 teaspoon sriracha, or to taste
For the spicy bowls:
3 cups cooked quinoa or brown or white rice
1 large cucumber, diced
3 scallions, trimmed and sliced into small pieces on the diagonal
1 cup shelled edamame
2 large avocados, cubed or cut into thin slices
2 tablespoons black or white sesame seeds or a mix
Optional: red onion rings, sliced tomatoes, shredded carrots, chopped red cabbage, enoki mushrooms, and other fresh veggies of your choice
Directions
Step 1
Using a sharp knife, cut the salmon into 1-inch chunks. Add to a glass bowl with the soy sauce, sesame oil, rice vinegar, and 1 tablespoon of olive oil. Toss well and set aside for 30 minutes.
Step 2
Make the spicy mayo: In a small bowl, whisk the mayonnaise and the olive oil until well blended, then mix in the sriracha; set aside.
Step 3
Heat a frying pan over medium-high heat. When hot, add the rest of the olive oil and the salmon chunks. Sear on all sides, using tongs to turn the pieces. When cooked through, remove the pan from the heat.
Step 4
Assemble the ingredients in four deep bowls: Center equal amounts of the cooked grains, then top with the vegetables and then the salmon chunks. Use a fork to drizzle on the spicy mayo, then sprinkle with the sesame seeds.
Makes 4 servings
Healthy Ingredient Spotlight
Black and White Sesame Seeds
Sesame seeds are more than a colorful and crunchy garnish—they can be pressed to make the Asian staple sesame oil, both the plain and toasted varieties, and whipped into the Middle Eastern treats tahini and halvah. Importantly, these little seeds pack a big punch when it comes to nutrients, so consider sprinkling them on more than poke bowls and sushi rolls.
Sesame seeds are rich in fat; protein; minerals like iron, calcium, copper, potassium, and manganese; vitamins like A and E and B vitamins; and fiber. Among their phytochemicals are lignans, which have antioxidant and anti-inflammatory properties. Because more of these nutrients, including their lignans, are in the hull, always choose unhulled sesame seeds. Black ones almost always come with the hull intact, but you’ll have to look carefully to find unhulled white ones.
Black and white sesame seeds have some taste differences, with the black ones being slightly crunchier and more bitter. I like to mix the two because this creates visual appeal and different taste sensations.
Quick Kitchen Nugget
Thawing Frozen Fish
Fish that’s caught in faraway waters and flash-frozen at sea often retains more of its nutrients and flavor—you’ll often see the words “previously frozen” on thawed fish at markets, a potential good sign. If you’re buying fish still frozen, make sure it’s frozen solid when you purchase it. Let it thaw overnight in the fridge, not on a countertop, to preserve that freshness—defrosting it in a cold fridge also helps inhibit the growth of any harmful bacteria. To do it properly, take it out of its packaging and put it on a plate or tray lined with a few sheets of paper towels or on a rack over the plate with paper towels. Just before cooking, rinse under cold water and pat dry.
For Your Best Health
Seafood: Why “Wild” Wins Hands Down
Research done at the University of Cambridge in the UK offers more insight into why farmed salmon isn’t as nutritious as wild salmon or other wild-caught fish, like mackerel, anchovies, and herring—even though these same varieties are often used in farmed salmon feeds. These oily fish contain essential nutrients including calcium, B12, and omega-3s, but they don’t transfer over in the same amounts when fed to farmed salmon.
By analyzing the flow of nutrients from the edible species of wild fish used as feed, which also included sprat and blue whiting, to the farmed salmon they were fed to, scientists found that farmed salmon production leads to an overall loss of essential dietary nutrients. Quantities of calcium were over five times higher in wild feed fish fillets than in farmed salmon fillets; iodine was four times higher; and iron, omega-3s, vitamin B12, and vitamin A were over 1.5 times higher. Wild feed species and farmed salmon did have comparable quantities of vitamin D. Zinc and selenium were actually higher in the farmed salmon than in the wild feed species due to other salmon feed ingredients—a real mark of progress in the salmon sector, said the researchers.
Another interesting point is that you can get key nutrients, including omega-3 fatty acids, which are known to reduce the risk of cardiovascular disease and stroke, in smaller portion sizes of wild fish than in farmed Atlantic salmon.
“What we’re seeing is that most species of wild fish used as feed have a similar or greater density and range of micronutrients than farmed salmon fillets,” said lead author David Willer, PhD, of the zoology department at Cambridge. “While still enjoying eating salmon and supporting sustainable growth in the sector, people should consider eating a greater and wider variety of wild fish species like sardines, mackerel, and anchovies, to get more essential nutrients straight to their plate.” He goes on to say that eating more wild feed species directly could benefit our health while also reducing aquaculture demand for finite marine resources.
“Marine fisheries are important local and global food systems, but large catches are being diverted toward farm feeds. Prioritizing nutritious seafood for people can help improve both diets and ocean sustainability,” said senior author James Robinson, PhD, of Lancaster University, also in the UK.
Fitness Flash
Forget the Calendar: What Counts Is Your Biological Age
University of Pittsburgh researchers have uncovered blood-based markers that allow them to predict a person’s biological age—how fast a person’s cells and organs age regardless of their birthdate. The new research, published in Aging Cell, points to pathways and compounds that may underlie biological age, shedding light on why people age differently and suggesting novel targets for interventions that could slow aging and increase health span, the length of time a person is healthy.
“Age is more than just a number,” said senior author Aditi Gurkar, PhD, assistant professor of geriatric medicine at Pitt’s School of Medicine and member of the Aging Institute, a joint venture of Pitt and UPMC. “Imagine two people aged 65: One rides a bike to work and goes skiing on the weekends, and the other can’t climb a flight of stairs. They have the same chronological age, but very different biological ages. Why do these two people age differently? This question drives my research.”
To answer it, Dr. Gurkar and her team compared 196 older adults whom they classified as either healthy or rapid agers by how easily they completed simple walking challenges. Because walking ability is a holistic measure of cardiovascular fitness, physical strength, and neurological health, other studies have shown that it’s the single best predictor of hospitalization, disability, functional decline, and death in older adults. Healthy agers were 75 years or older and could ascend a flight of stairs or walk for 15 minutes without resting, and the rapid agers, who were 65 to 75 years old, had to rest during these challenges.
According to Dr. Gurkar, this study is unique because the rapid agers were chronologically younger than the healthy agers, allowing the researchers to home in on markers of biological, not chronological, aging, unlike other studies that have compared young adults with older people.
To define a molecular fingerprint of biological aging in blood samples from participants, they performed metabolomics, the analysis of metabolites, or molecules that are produced by chemical pathways in the body, with blood samples from the two groups.
“Other studies have looked at genetics to measure biological aging, but genes are very static: the genes you’re born with are the genes you die with,” said Dr. Gurkar. “We chose to look at metabolites because they are dynamic: They change in real time to reflect our current health and how we feel, and we have the power to influence them through our lifestyles, diet, and environment.” Healthy and rapid agers showed clear differences in their metabolomes, indicating that metabolites in the blood could reflect biological age.
Dr. Gurkar and her team next identified 25 metabolites that they termed the Healthy Aging Metabolic (HAM) Index. They found that the HAM Index was better than other commonly used aging metrics, such as the frailty index, gait speed, and the Montreal Cognitive Assessment test, at distinguishing healthy and rapid agers. To validate their new index, the researchers analyzed a separate cohort of older adults from a Wisconsin-based study. The HAM Index correctly predicted whether individuals could walk outside for 10 minutes without stopping with accuracy of about 68%.
“We took a very different cohort of people from a different geographical region, and we saw the same metabolites were associated with biological aging,” said Dr. Gurkar. “This gives us confidence that the HAM Index can truly predict who is a healthy ager versus a rapid ager.”
Using an artificial intelligence model that can predict potential drivers of biological traits, the team identified three main metabolites that were most likely to promote healthy aging or drive rapid aging. In future research, they plan to delve into how these metabolites and molecular pathways that produce them contribute to biological aging and explore interventions that could slow this process. Dr. Gurkar is also planning more research to evaluate how the metabolome of younger people shifts over time. Eventually, she hopes to develop a blood test that could estimate biological age in young adults or predict those who might go on to develop diseases of aging.
“While it’s great that we can predict biological aging in older adults, what would be even more exciting is a blood test that, for example, can tell someone who’s 35 that they have a biological age more like a 45-year-old,” Dr. Gurkar said. “That person could then think about changing aspects of their lifestyle early—whether that’s improving their sleep, diet or exercise regimen—to hopefully reverse their biological age. Today, in medicine, we tend to wait for a problem to occur before we treat it. But aging doesn’t work that way—it’s about prevention. I think the future of medicine is going to be about knowing early on how someone is aging and developing personalized interventions to delay disease and extend health span.”
Poke bowls are still very popular, but it’s not always easy to buy the sushi-grade tuna needed to make your own. This variation includes sautéed chunks of salmon instead of ahi. The technique is also great if you like tuna but prefer it cooked. I’ve suggested many veggies to fill up your bowl, but have fun choosing other ingredients—be guided by what’s most fresh at your market.
Ingredients
For the fish:
1 pound skinless salmon fillet, wild caught if possible
1 tablespoon regular or reduced-sodium soy sauce
1 tablespoon sesame oil
1 tablespoon rice vinegar
3 tablespoons extra virgin olive oil, divided use
For the spicy mayo:
1/4 cup best-quality mayonnaise
1 tablespoon extra virgin olive oil
1 teaspoon sriracha, or to taste
For the spicy bowls:
3 cups cooked quinoa or brown or white rice
1 large cucumber, diced
3 scallions, trimmed and sliced into small pieces on the diagonal
1 cup shelled edamame
2 large avocados, cubed or cut into thin slices
2 tablespoons black or white sesame seeds or a mix
Optional: red onion rings, sliced tomatoes, shredded carrots, chopped red cabbage, enoki mushrooms, and other fresh veggies of your choice
Directions
Step 1
Using a sharp knife, cut the salmon into 1-inch chunks. Add to a glass bowl with the soy sauce, sesame oil, rice vinegar, and 1 tablespoon of olive oil. Toss well and set aside for 30 minutes.
Step 2
Make the spicy mayo: In a small bowl, whisk the mayonnaise and the olive oil until well blended, then mix in the sriracha; set aside.
Step 3
Heat a frying pan over medium-high heat. When hot, add the rest of the olive oil and the salmon chunks. Sear on all sides, using tongs to turn the pieces. When cooked through, remove the pan from the heat.
Step 4
Assemble the ingredients in four deep bowls: Center equal amounts of the cooked grains, then top with the vegetables and then the salmon chunks. Use a fork to drizzle on the spicy mayo, then sprinkle with the sesame seeds.
Wilted Spinach Salad with Sherry Vinaigrette Recipe, Spotlight on Spinach, The Great Egg Debate Continues, and How Sleep Patterns Influence Health
Spinach salad is a perennial favorite, simple to prepare, satisfying, and chock-full of nutrients. Wilting the spinach before composing the salad was a foodie trend back in the 1970s (the fixings included mandarin orange segments, a nod to the value of eating a food containing vitamin C at the same meal as spinach to better access the green’s iron). My update adds the tasty crunch of hazelnuts. You’ll be intrigued by a new report that suggests fortified eggs may not pose the cholesterol risks of regular eggs. I’m also sharing the latest research on the perils of poor sleep—motivation to improve the quality of your shut-eye.
Fast-forward 50 years from wilted spinach salad’s debut to this version that offers all the benefits of olive oil in the dressing and the prep. Rather than bothering with croutons, try toasted slices of whole-grain bread for its hearty appeal.
Ingredients
For the vinaigrette:
1 tablespoon sherry vinegar, plus more to taste
1 tablespoon shallot, peeled and finely chopped
1 teaspoon fresh thyme, chopped
1/4 cup extra virgin olive oil
Coarse salt and freshly ground black pepper to taste
For the salad:
3 tablespoons extra virgin olive oil
1 small red onion, chopped
4 ounces white or cremini mushrooms, thickly sliced
8 ounces baby spinach, rinsed and patted dry
2 garlic cloves, minced
2 medium- or hard-boiled eggs (your preference) quartered
1 ounce hazelnuts, coarsely chopped
Optional: 2 slices whole grain bread, toasted and brushed with olive oil
Directions
Step 1
Make the vinaigrette: In a medium mixing bowl, whisk together the vinegar, shallot, and thyme. Gradually whisk in the olive oil until incorporated. Season to taste with salt and pepper.
Step 2
Heat a large frying pan or wok over medium heat. When hot, add 2 tablespoons olive oil and the red onions; sauté over medium heat until soft. Push them to the outside of the pan and add the mushrooms in one layer; cook until the edges have browned, then flip and brown on the other side. Transfer the vegetables to a bowl.
Step 3
Add the last tablespoon of olive oil to the hot pan along with the garlic and the spinach, adding the spinach by handfuls—as one batch starts to wilt, push it to the side and add another, stirring quickly. It should only take 2-3 minutes to do it all.
Step 4
Arrange the spinach in two large bowls and top with equal amounts of onions, mushrooms, eggs, and hazelnuts. Drizzle with the vinaigrette. If desired, add a slice of toast to one side of each bowl.
Makes 2 servings
Healthy Ingredient Spotlight
Spinach: Maximizing Its Nutrients
It’s no secret that, as a leafy green, spinach is a healthy food. What is less well known is that your body will better process two of its key nutrients, iron and calcium, when the spinach is cooked. That’s because it also contains oxalic acid, which blocks the minerals’ absorption unless the oxalates are broken down under high-heat cooking. If your recipe doesn’t include sautéing, another option is to plunge the spinach into boiling water for 60 seconds and then right into a bowl of ice-cold water to stop the cooking process and keep it a brighter green.
To get more of the iron when eating spinach raw, add a vitamin C food, like orange segments, to your meal.
Your body absorbs more folate and lutein when eating spinach raw, so varying your prep is a good idea.
More reasons to eat spinach: It’s also rich in vitamins K, C, A, E, and B6 as well as folate and riboflavin and in the minerals manganese, magnesium, copper, and potassium. It has many carotenoids, among other antioxidants, to protect cell health and guard against inflammation.
Quick Kitchen Nugget
A Better Type of Frozen Spinach
When fresh isn’t available, frozen can be a good substitute. The key to more flavorful frozen spinach is to select leaf spinach rather than chopped spinach. The leaves go through a lot less processing, translating to better taste and less freezer burn. Of course, look for pure spinach—no added salt or any other ingredients.
For Your Best Health
The Next Round in the “Are Eggs Healthy?” Debate
Because eggs contain some saturated fat, which is linked to higher cholesterol levels, there’s been much research on finding the right number of eggs to eat per week to help keep cholesterol in line. Results from a prospective controlled trial presented at the American College of Cardiology’s Annual Scientific Session offer positive news for egg lovers. One hundred and forty patients with or at high risk for cardiovascular disease were enrolled in the PROSPERITY study and divided into two groups to assess the effects of eating 12 or more fortified eggs a week versus a non-egg diet (fewer than two eggs a week) on HDL and LDL cholesterol and other key markers of cardiovascular health, including lipid, cardiometabolic, and inflammatory biomarkers and levels of vitamins and minerals. At the end of the four-month study period, cholesterol levels were similar in the two groups.
“We know that cardiovascular disease is, to some extent, mediated through risk factors like high blood pressure, high cholesterol, increased BMI, and diabetes. Dietary patterns and habits can have a notable influence on these, and there’s been a lot of conflicting information about whether or not eggs are safe to eat, especially for people who have or are at risk for heart disease,” said Nina Nouhravesh, MD, a research fellow at the Duke Clinical Research Institute in Durham, North Carolina, and the study’s lead author. “This is a small study, but it gives us reassurance that eating fortified eggs is OK with regard to lipid effects over four months, even among a more high-risk population.”
Dr. Nouhravesh and her team looked specifically at fortified eggs as they contain less saturated fat and have additional vitamins and minerals such as iodine; vitamins D, B2, 5, and 12; selenium; and omega-3 fatty acids. All the participants were 50 years of age or older (the average age was 66 years), half were female, and 27% were African American. All had experienced one prior cardiovascular event or had two cardiovascular risk factors, such as high blood pressure, high cholesterol, increased BMI, and/or diabetes.
Participants had in-person clinic visits at the start of the study and visits at one and four months to take vital signs and have bloodwork done; phone check-ins occurred at two and three months. People in the fortified egg group were asked about their weekly egg consumption, and those with low adherence were given additional educational materials.
Results showed a -0.64 mg/dL and a -3.14 mg/dL reduction in so-called good HDL cholesterol and bad LDL cholesterol, respectively, in the fortified egg group. While not statistically significant, the differences suggest, according to the researchers, that eating 12 fortified eggs each week had no adverse effect on blood cholesterol. In terms of secondary endpoints, researchers observed a numerical reduction in total cholesterol, LDL particle number, another lipid biomarker called apoB, high-sensitivity troponin (a marker of heart damage), and insulin resistance scores in the fortified egg group, while vitamin B increased.
“While this is a neutral study, we did not observe adverse effects on biomarkers of cardiovascular health and there were signals of potential benefits of eating fortified eggs that warrant further investigation in larger studies as they are more hypothesis generating here,” Dr. Nouhravesh said, explaining that subgroup analyses revealed numerical increases in HDL cholesterol and reductions in LDL cholesterol in patients 65 years or older and those with diabetes in the fortified egg group compared with those eating fewer than two eggs.
Note that what you eat with your eggs counts: buttered toast and bacon and other processed meats are not heart-healthy choices. As always, Dr. Nouhravesh said, it’s a good idea for people with heart disease to talk with their doctor about a heart-healthy diet.
It’s important to point out that this was a single-center study with a small size and reliance on patients’ self-reporting of their egg consumption and other dietary patterns. It was also an unblinded study, which means patients knew what study group they were in, which can influence their health behaviors, and it was funded by Eggland’s Best, a company that offers eggs from cage-free and pasture-raised/free-range hens.
Fitness Flash
How Your Sleep Pattern Influences Your Health
Poor sleep habits are strongly associated with long-term chronic health conditions, according to decades of research. To better understand this relationship, researchers led by Soomi Lee, PhD, associate professor of human development and family studies at Penn State’s College of Health and Human Development, identified four distinct patterns that characterize how most people sleep and how they correlate to overall health. Results were published in Psychosomatic Medicine.
Using a national sample of adults from the Midlife in the United States (MIDUS) study, they gathered data on approximately 3,700 participants’ sleep habits and chronic health conditions across two time points 10 years apart. The data included self-reported sleep habits, including sleep regularity and duration, perceived sleep satisfaction, and daytime alertness, as well as the number and type of chronic conditions they had.
With that information, the researchers identified these four different sleep patterns:
Good sleepers with optimal sleep habits across all data points
Weekend catch-up sleepers with irregular sleep, specifically short average sleep duration, but longer sleep times on weekends or non-workdays
Insomnia sleepers with sleep problems related to clinical insomnia symptoms, including short sleep duration, high daytime tiredness, and a long time to fall asleep
Nappers with mostly good sleep but frequent daytime naps
The MIDUS study may not represent the entire population, researchers said, as it primarily comprises healthy adults, but they still found that more than half the participants were insomnia sleepers or nappers, both suboptimal sleep patterns. Additionally, being an insomnia sleeper over the 10-year period was associated with a significantly higher likelihood of chronic health conditions, including cardiovascular disease, diabetes, and depression. Results also showed that people were unlikely to change their sleep pattern over the course of the 10 years, especially the insomnia sleepers and nappers.
“These results may suggest that it is very difficult to change our sleep habits because sleep health is embedded into our overall lifestyle. It may also suggest that people still don’t know about the importance of their sleep and about sleep health behaviors,” Dr. Lee said. “We need to make more efforts to educate the public about good sleep health. There are sleep hygiene behaviors that people could do to improve their sleep, such as not using cell phones in bed, exercising regularly and avoiding caffeine in the late afternoon.”
While the sleep patterns were seemingly not age-related, researchers found that older adults and retirees were more likely to be nappers. They also found that those with less education and those facing unemployment were more likely to be insomnia sleepers.
According to Dr. Lee, the fact that phase of life and economic conditions can influence long-standing sleep patterns suggests that societal and neighborhood influences—including economic stressors and access to health resources—may have significant effects on individual health and, in this case, sleep habits.
The researchers added that their findings strongly suggest the need for programs and interventions to promote healthy sleep and sleep habits and that such programs should not be one-size-fits-all but rather should be targeted based on a variety of factors, including the risk of chronic conditions and socioeconomic vulnerability.
“Sleep is an everyday behavior,” Dr. Lee said. “Sleep is also modifiable. So, if we can improve sleep almost every day, what outcomes might we see after several months, or even several years? Better sleeping habits can make many significant differences, from improving social relationships and work performance to promoting long-term healthy behaviors and healthy aging.”
According to the CDC, these good habits can help improve sleep health:
Go to bed at the same time each night and get up at the same time each morning, weekends included.
Keep your bedroom quiet, dark, and at a cool, comfortable temperature.
Keep all electronic devices, including laptops and cell phones, out of your bedroom.
Skip large meals, caffeinated drinks, and alcohol before bed.
