Crock Pot Rigatoni - cooking recipe

Ingredients

28 ounces spaghetti sauce, jarred or home-made
12 ounces rigatoni pasta, cooked
1 1/2 lbs ground beef or 1 1/2 lbs sausage, browned
3 cups shredded mozzarella cheese
1/2 - 3/4 lb sliced pepperoni
sliced mushrooms (etc.) (optional) or onion (etc.) (optional)

Preparation

Layer half of each ingredient in the order listed.
Repeat.
Cover, Cook on low 4-5 hours.