01 - Preheat the oven to 400°F. Lightly grease a baking dish.
02 - In a bowl, combine feta cheese, spinach, minced garlic, cream cheese, dill, salt, and black pepper. Mix until well blended.
03 - Slice a pocket horizontally into each chicken breast, taking care not to cut all the way through.
04 - Stuff each pocket generously with the spinach and feta mixture. Secure with toothpicks if needed.
05 - Rub the outside of the breasts with olive oil, season with additional salt and pepper.
06 - Place the stuffed chicken breasts in the prepared baking dish.
07 - Bake for 25–30 minutes, or until the chicken is cooked through and the juices run clear.
08 - Remove toothpicks. Serve with lemon wedges on the side.