Creating Savory Stuffed Chicken with Roasted Red Peppers, Spinach, and Mozzarella involves a series of straightforward steps. Follow these instructions carefully for best results:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Chicken: Place the chicken breasts between two sheets of plastic wrap and pound them to an even thickness using a meat mallet. This ensures uniform cooking.
3. Make Filling: In a mixing bowl, combine the chopped roasted red peppers, spinach, mozzarella cheese, Parmesan cheese, garlic, Italian seasoning, salt, and pepper. Mix well until fully combined.
4. Stuff Chicken: Take one chicken breast and spoon some of the filling onto the center. Roll the chicken around the filling to create a neat package. Secure with toothpicks or kitchen twine.
5. Heat Olive Oil: In an oven-safe skillet, heat the olive oil over medium-high heat. Once hot, add the stuffed chicken and sear on both sides for about 3-4 minutes until golden brown.
6. Transfer to Oven: Once seared, transfer the skillet to the preheated oven. Bake for 25-30 minutes until the chicken reaches an internal temperature of 165°F (74°C).
7. Rest and Serve: Remove from the oven, allow to rest for 5-10 minutes before slicing. This keeps the juices inside the chicken.