Step 1: Prepare the Filling : Heat 1 tablespoon olive oil in a skillet over medium heat. Add minced garlic and sauté for 30 seconds until fragrant. Add spinach and cook for 2–3 minutes until wilted. Remove from heat, let cool slightly, then stir in feta cheese, cream cheese (if using), oregano, salt, and pepper. Mix well to create a creamy filling.
Step 2: Prepare the Chicken : Place the chicken breasts on a cutting board. Using a sharp knife, cut a pocket horizontally into the thickest part of each breast — careful not to cut all the way through. Season each chicken breast with garlic powder, paprika, salt, and pepper on both sides.
Step 3: Stuff the Chicken : Spoon the spinach-feta mixture into each chicken pocket, dividing evenly. Use toothpicks to secure the openings if needed to keep the filling inside.
Step 4: Sear the Chicken (Optional for Extra Flavor) : Heat 1 tablespoon olive oil in an oven-safe skillet over medium-high heat. Sear each chicken breast for 2 minutes per side, until lightly golden. (If not using an oven-safe skillet, transfer chicken to a baking dish afterward.)
Step 5: Bake the Chicken : Preheat oven to 375°F (190°C). Bake the stuffed chicken for 20–25 minutes, or until internal temperature reaches 165°F (74°C). Remove from oven and let rest for 5 minutes before serving.