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

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Filling: In a large bowl, combine chopped spinach, feta cheese, cream cheese, minced garlic, oregano, salt, and pepper. Mix until well combined.
3. Prepare the Chicken: Pat the chicken breasts dry with paper towels. Using a sharp knife, carefully create a pocket in each chicken breast by slicing horizontally, making sure not to cut all the way through.
4. Stuff the Chicken: Generously spoon the spinach and feta filling into each chicken breast pocket, securing the opening with toothpicks if necessary.
5. Heat Olive Oil: In an oven-safe skillet, heat olive oil over medium heat.
6. Sear the Chicken: Place the stuffed chicken breasts in the skillet and sear for about 3-4 minutes on each side until golden brown.
7. Bake: Transfer the skillet to the preheated oven and bake for 25-30 minutes until the chicken is cooked through and reaches an internal temperature of 165°F (75°C).
8. Optional Topping: If desired, sprinkle grated Parmesan cheese on top of the chicken during the last 5 minutes of baking for an extra layer of flavor.
9. Rest the Chicken: Once cooked, remove the skillet from the oven and let the chicken rest for 5 minutes before serving.
10. Garnish and Serve: Garnish with fresh parsley before serving for a pop of color.

By following these steps, you can create a delicious and impressive Spinach and Feta Stuffed Chicken that will surely delight everyone at the table.