Follow these simple steps to create your Savory Stuffed Chicken with Roasted Red Peppers, Spinach, and Mozzarella:

1. Preheat Oven: Preheat your oven to 375°F (190°C) and prepare a baking dish by lightly greasing it.

2. Prepare Filling: In a mixing bowl, combine diced roasted red peppers, chopped spinach, minced garlic, shredded mozzarella cheese, and Italian seasoning. Mix until well combined and set aside.

3. Prepare Chicken Breasts: Carefully slice each chicken breast horizontally to create a pocket. Do not cut all the way through; you want to maintain the integrity of the chicken.

4. Stuff Chicken Breasts: Generously fill each chicken pocket with the prepared filling. Secure the openings using toothpicks or kitchen twine to hold the filling inside during cooking.

5. Season Chicken: Rub the outside of the stuffed chicken breasts with olive oil and sprinkle with salt and pepper for added flavor.

6. Bake: Place the stuffed chicken breasts in your prepared baking dish. Bake in the preheated oven for 25-30 minutes, or until the chicken is cooked through and has reached an internal temperature of 165°F (75°C).

7. Rest and Serve: Remove the chicken from the oven and allow it to rest for a few minutes before serving. This will help keep the juices inside the chicken.