01 - In a large bowl, combine ground turkey or chicken, egg, oats, red onion, Dijon mustard, garlic, parsley, smoked paprika, salt, and black pepper. Mix gently until just combined—do not overwork the meat.
02 - Divide mixture into 4 equal portions and shape each into a patty about 1/2 inch thick. Press gently to form without compacting the meat.
03 - Preheat a nonstick skillet or grill over medium-high heat. Lightly oil the surface if needed.
04 - Cook patties for 4-5 minutes per side, or until golden brown and fully cooked through. Internal temperature should reach 165°F.
05 - Lightly toast whole wheat buns if desired for added texture and warmth.
06 - Place a lettuce leaf on the bun base, top with a cooked patty, Greek yogurt, tomato, onion, avocado slices if using, and finish with the top bun.