Creating Spinach and Feta Stuffed Chicken is simple when you follow these steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Filling: In a mixing bowl, combine the chopped spinach, feta cheese, cream cheese, minced garlic, oregano, salt, and black pepper. Mix until well incorporated.
3. Prepare Chicken: Using a sharp knife, make a pocket in each chicken breast by slicing horizontally through the thickest part.
4. Stuff Chicken: Generously fill each chicken breast pocket with the spinach and feta mixture.
5. Secure Filling: Use toothpicks or kitchen twine to secure the openings of the stuffed chicken breasts.
6. Sear Chicken: In a large oven-safe skillet, heat the olive oil over medium-high heat. Add the stuffed chicken breasts and sear for 3-4 minutes on each side until golden brown.
7. Bake Chicken: Transfer the skillet to the preheated oven and bake for 25-30 minutes, or until the chicken is cooked through (internal temperature should reach 165°F/75°C).
8. Add Cheese: If desired, sprinkle mozzarella cheese on top of the chicken during the last 5 minutes of baking.
9. Rest: Once done, remove the skillet from the oven and allow the chicken to rest for 5 minutes before serving.
10. Garnish and Serve: Optionally garnish with fresh parsley before serving.

With these easy steps, you’ll have a deliciously stuffed chicken ready to impress!