Pepperoni and cheese stuffed chicken is a flavorful and satisfying dish that is easy to make with a food processor. To make the stuffing, you will need 1 cup of shredded mozzarella cheese, 1/2 cup of chopped pepperoni, 1/4 cup of chopped fresh parsley, and 1/4 cup of breadcrumbs. Combine the cheese, pepperoni, parsley, and breadcrumbs in the food processor and pulse until well combined. Cut a pocket in each chicken breast and stuff with the pepperoni and cheese mixture. Season the chicken with salt and pepper, then bake in a preheated oven at 375°F for 25-30 minutes or until the chicken is cooked through.