Adjust the oven temperature to 375. In a baking dish, place 1/2 cup of sauce on the bottom and arrange the chicken in the dish. Using a spoon, distribute sauce (about 2 tablespoons per piece) on top of each piece of chicken and then a slice of mozzarella on each. sprinkle with parsley and bake for about 20 minutes, until the cheese is melted.
Serve with your favorite pasta, loaf of bread or a vegetable.