01 - Using a sharp knife, slice a deep horizontal pocket into each chicken breast without cutting through.
02 - In a bowl, blend thawed spinach, crumbled feta cheese, and garlic powder until evenly mixed.
03 - Evenly distribute the spinach and feta mixture inside each chicken breast pocket. Lightly sprinkle both sides of the chicken with paprika.
04 - Transfer stuffed chicken breasts to a preheated skillet or oven and cook at 375°F (190°C) until juices run clear and internal temperature reaches 165°F (74°C), approximately 25 minutes.