Crock-Pot Pizza
["1 1/2 lb. hamburger", "small onion", "2/3 ??? rigatoni", "pepperoni (optional)", "mushrooms (optional)", "2 jars pizza sauce", "2 (8 oz.) Mozzarella cheese"]
["Layer and cook 5 hours.", "Add cheese last hour of cooking."]
["hamburger", "onion", "rigatoni", "pepperoni", "mushrooms", "pizza sauce", "Mozzarella cheese"]