Crock-Pot Pizza - cooking recipe

Ingredients

1 1/2 lb. hamburger
1 medium onion, chopped
2/3 box rigatoni pasta, cooked and drained (I use whatever I have)
1 qt. pizza sauce
1 lb. Mozzarella cheese, shredded
1 pkg. pepperoni
1 large can mushrooms, drained

Preparation

Layer 3 times in crock-pot.
Cook on low 5 hours.
I often toss in other pizza toppings, black olives, green peppers, etc. Again whatever I have at the house.