Freeze Ahead: Make recipe through step #6. Place baking dish in freezer until completely frozen. Tightly cover with foil or plastic wrap and store in freezer until ready to use. When ready to use, preheat oven to 350˚F. Place covered, frozen ziti directly into oven and bake for 45 minutes. Uncover and continue baking for an additional 15 minutes or until completely heated through and cheese on top has melted and browned. Serve.