Make the sauce. In a small bowl, whisk the Greek yogurt, lemon juice, olive oil, garlic, and herbs.
Season with salt and pepper. Refrigerate while you prep the patties so the flavors meld.
Mix the turkey. In a large bowl, combine ground turkey, grated onion, garlic, egg, breadcrumbs (or oats), Dijon mustard, smoked paprika, oregano, cumin, salt, and pepper. Mix gently with a fork or your hands until just combined.
Don’t overwork the meat.
Form patties. Divide the mixture into 4–6 equal portions and shape into patties about 1/2 inch thick. Press a slight dent in the center of each patty to prevent doming as they cook.
Rest the patties. Place the patties on a plate, cover, and let them rest in the fridge for 10–15 minutes. This helps them hold together and stay juicy.
Cook on the stove or grill. Heat a large skillet or grill over medium to medium-high.
Brush with olive oil. Cook patties for 4–5 minutes per side, until browned and the internal temperature reaches 165°F (74°C). Avoid pressing down on the patties.
Prep the plate. While the patties cook, add greens, tomatoes, cucumber, and red onion to each plate.
Spoon on your cooked grain or potatoes. Add avocado if using.
Assemble. Place a turkey patty on each plate. Spoon the yogurt herb sauce over the top or serve on the side.
Finish with a squeeze of fresh lemon and a pinch of salt over the veggies.
Serve. Enjoy warm. For extra crunch and flavor, sprinkle with chopped herbs, toasted seeds, or a dash of chili flakes.