Crock Pot Pizza Casserole

Grrrrrgh!
Course : Casseroles
From: HungryMonster.com
Serves: 1
 

Ingredients:

1 1/2 pounds lean ground beef
2 medium onions -- chopped
16 ounces rigatoni, -- cooked
2 cans pizza sauce
2 pounds shredded mozzarella cheese
1 package pepperoni
1 package mushrooms
 

Preparation:

In a skillet, brown and crumble meat along with onions. Layer ingredients in crock pot in the order given. Cook low for 5 hours. Makes a full pot.