01 -
Heat grill to medium temperature.
02 -
Combine olive oil, oregano, salt, and pepper. Marinate chicken fillets in the mixture for 30 minutes.
03 -
Cook chicken on grill for 6-7 minutes per side until fully cooked through.
04 -
Allow grilled chicken to rest briefly, then slice into strips.
05 -
Combine crumbled feta cheese, Greek yogurt, lemon juice, and minced garlic in a bowl. Mix until smooth.
06 -
Separate romaine leaves and fill each with sliced chicken strips. Drizzle with feta sauce before serving.