In a bowl, combine the chicken, sauce, cream cheese, spices, 1/4 cup of mozzarella cheese, and the Parmesan cheese. Add the filling to the peppers. Top with the remaining 3/4 cup mozzarella cheese.
2 cups shredded chicken breast, 1 cup spaghetti sauce, 4 ounces cream cheese, 1 cup mozzarella cheese, 1/4 cup Parmesan cheese, 1/2 tablespoon dried parsley, 1/2 tablespoon dried basil, 1 1/2 teaspoon kosher salt, 1 teaspoon onion powder, 1/4 teaspoon ground black pepper