Step 1: Prepare the Chicken

1. Preheat your oven to 375°F (190°C).
2. Place the chicken breasts on a cutting board. Using a sharp knife, carefully slice a pocket into each chicken breast, ensuring you don’t cut all the way through.
3. Season the chicken breasts inside and out with salt, black pepper, garlic powder, and paprika.

Step 2: Make the Filling

1. In a medium bowl, combine spinach, ricotta cheese, mozzarella cheese, Parmesan cheese, minced garlic, red pepper flakes, and nutmeg. Mix until well blended.
2. Divide the filling evenly and spoon it into the pockets of each chicken breast. Use toothpicks to secure the opening if necessary.

Step 3: Sear the Chicken

1. Heat 2 tablespoons of olive oil in a large oven-safe skillet over medium-high heat.
2. Sear the stuffed chicken breasts for 2–3 minutes on each side until golden brown.

Step 4: Bake the Chicken

1. If using breadcrumbs, mix them with olive oil and parsley, then sprinkle over the chicken breasts.
2. Transfer the skillet to the preheated oven and bake for 25–30 minutes, or until the chicken reaches an internal temperature of 165°F (74°C).

Step 5: Serve

1. Remove the toothpicks (if used) before serving.
2. Garnish with extra parsley and serve hot with your choice of sides.