01 - Preheat oven to 375°F. Lightly grease a baking dish with cooking spray or olive oil.
02 - Heat 1 tablespoon olive oil in a skillet over medium heat. Sauté minced garlic for 1 minute until fragrant. Add chopped spinach and cook 2-3 minutes until wilted. Remove from heat and let cool slightly.
03 - Combine cooked spinach, crumbled feta, cream cheese, chopped dill, nutmeg, and lemon zest in a mixing bowl. Mix thoroughly until evenly distributed.
04 - Pat chicken breasts dry with paper towels. Using a sharp knife, carefully cut a horizontal pocket into the thickest side of each breast, stopping before cutting through completely.
05 - Divide filling evenly among chicken breasts. Stuff each pocket with spinach mixture. Secure openings with toothpicks to prevent filling from escaping during cooking.
06 - Rub chicken breasts with remaining 1 tablespoon olive oil. Season evenly with salt, black pepper, and paprika on all sides.
07 - Arrange stuffed chicken in prepared baking dish. Bake 25-30 minutes until cooked through and juices run clear. Internal temperature should reach 165°F when tested with a meat thermometer.
08 - Remove from oven and carefully remove toothpicks. Let chicken rest 5 minutes before serving to allow juices to redistribute.