2 lb. ground beef
16 oz. spaghetti sauce
1 bag egg noodles
1 pkg. pepperoni
1 lg. bag shredded cheddar cheese
1 lg. bag shredded mozzarella cheese
mushrooms are optional

Brown ground beef and set aside. Boil noodles until they start to soften (they will finish cooking in the crock-pot). Combine meat, noodles, and spaghetti sauce in a large bowl. Layer this mixture with the two cheeses and pepperoni in a crock pot. The top layer will be the cheeses and pepperoni. Warm in the crock pot until the cheese is completely melted (2-3 hours).