3 c. seashell macaroni
1 lg. jar spaghetti sauce
1/2-3/4 lb. pepperoni (bite size pieces)
8 oz. Mozzarella cheese
2 tbsp. Parmesan cheese
1 can mushrooms

Cook macaroni. Add remaining ingredients. Bake in a casserole dish at 350 degrees for 20-25 minutes.