Crock-Pot Pizza - cooking recipe

Ingredients

1 1/2 lb. ground beef, uncooked
1 medium onion, chopped
2 (15 oz.) jars pizza sauce
2 pkg. Mozzarella cheese
1 pkg. pepperoni
1 large can mushrooms, drained
2/3 box rigatoni noodles, cooked

Preparation

Layer in crock-pot 3 times:
meat and onion, sauce, mushrooms and pepperoni and then cheese.
Top with cheese.
Cook on low for 5 hours.