04Pour 1/2 cup of the spaghetti sauce in the bottom of a 9x13" baking pan. Arrange stuffed shells in a single layer on the sauce. Pour remaining sauce over top. Sprinkle with additional Parmesan cheese.
05To freeze, refrigerate at this point until cold. Then wrap, label, and freeze up to 3 months. To thaw and reheat, thaw whole casserole overnight in refrigerator. Bake as directed below, adding 15-20 minutes to baking time. To thaw and reheat individual shells, microwave on 40% power for 2-4 minutes until thawed. Then microwave on 60% power for 1-3 minutes until hot and bubbly.
06Cover with foil and bake at 350°F for 20-30 minutes or until hot and bubbly.