1 1/2 to 2 lbs. hamburger
1 lb. box Rigatoni noodles
1 can cream of mushroom soup
2 cans tomato soup
1 (15 oz.) can pizza sauce
1 tbsp. oregano
1 lb. Mozzarella cheese, shredded
3 oz. pkg. sliced pepperoni
1/3 c. chopped onion
1 or 2 cans mushrooms, undrained
1 (15 oz.) can tomato sauce

Cook noodles; drain. Brown hamburger, onions, and oregano. Mix together rest of ingredients except pepperoni and cheese. Mix hamburger mixture into noodle mixture. Layer noodle mixture with pepperoni and cheese in a 9x13 pan. End with a layer of pepperoni. Bake at 350 degrees for 1 hour.