Mix the patties
In a medium bowl combine the ground chicken, breadcrumbs, caramelized onions, Greek yogurt, basil, sun‑dried tomatoes, garlic, oregano, salt, and pepper. Use your hands to blend just until everything is evenly distributed—over‑mixing can make burgers tough.

Form & indent
Divide mixture into 4 equal portions and shape into ¾‑inch‑thick patties. Press a shallow thumbprint in the center of each to keep them flat while they cook.

Heat the pan or grill
Preheat a non‑stick skillet, grill pan, or outdoor grill over medium heat. Add the oil and swirl to coat.

Cook
Place patties in the hot pan. Cook 5–6 minutes until the undersides are golden, flip, then cook another 5–6 minutes. Use a meat thermometer to ensure the centers reach 165 °F. If they brown too quickly before they’re cooked through, lower the heat slightly and continue.

Build your burger
Toast buns if desired. Layer spinach, a patty, tomato, and a spoonful of extra caramelized onions. The sweet onions, bright basil, and juicy chicken make a fresh, feel‑good bite!