8 oz. medium tube pasta
1 (28 oz.) jar spaghetti sauce
1 (4 1/2 oz.) sliced mushrooms, drained
1 (8 oz.) pkg. sliced pepperoni
1/2 c. chopped green pepper
1/2 c. chopped onion
1/2 c. parmesan cheese
1/2 tsp. garlic powder
1/2 tsp. salt
1/8 tsp. pepper
1/8 tsp. crushed red pepper flakes
1 (8 oz.) can tomato sauce
2 c. shredded mozzarella cheese

Cook pasta according to package directions. Meanwhile, combine 2 1/3 c. spaghetti sauce, mushrooms, pepperoni, green pepper, onion, parmesan cheese, garlic powder, salt, pepper and red pepper flakes in a bowl. Drain pasta, add to sauce mixture and mix well. Transfer to a greased 3 qt. baking dish. Combine the tomato sauce and remaining spaghetti sauce; pour over top. Cover and bake at 350°F for 40-45 minutes or until bubbly. Sprinkle with mozzarella cheese.

Bake uncovered 5-10 minutes longer or until cheese is melted. Let stand 5 minutes before serving.