1 stick pepperoni, sliced
1 (8 oz.) can mushrooms, sliced
1 green pepper, diced
1 sm. onion, diced
1 can black olives, sliced
1 lb. rotini macaroni
1 lg. jar spaghetti sauce
1/4 tsp. oregano
1 lb. grated Mozzarella cheese

Cook macaroni as directed. Put into casserole dish with all other ingredients except the Mozzarella cheese. Mix well. Bake at 350 degrees for 30 minutes. Sprinkle shredded Mozzarella cheese on top of casserole. Let stand until melted.