01 - Preheat the oven to 400°F. Lightly grease a baking dish with cooking spray or a small amount of oil.
02 - Heat a skillet over medium heat. Add fresh spinach and cook for 2–3 minutes until wilted. Remove from heat and let cool slightly.
03 - In a mixing bowl, combine cooked spinach, crumbled feta cheese, softened cream cheese, minced garlic, chopped dill, nutmeg, and black pepper. Mix until well blended and creamy.
04 - Pat chicken breasts dry with paper towels. Using a sharp knife, carefully cut a horizontal pocket into the side of each chicken breast, taking care not to slice all the way through.
05 - Divide the spinach-feta mixture evenly among the chicken pockets. Secure openings with toothpicks if needed to prevent filling from escaping during cooking.
06 - Brush the outside of each stuffed chicken breast with olive oil. Season generously with salt, black pepper, and paprika on all sides.
07 - Arrange the stuffed chicken breasts in the prepared baking dish. Bake for 25–30 minutes until chicken reaches an internal temperature of 165°F and juices run clear.
08 - Remove from oven and carefully remove toothpicks. Let chicken rest for 5 minutes to allow juices to redistribute. Garnish with lemon wedges and fresh parsley if desired.