1 lg. can tomato sauce, or spaghetti sauce
1 lb. hamburger
1 lg. onion, chopped
1 pepper, chopped
1 sm. can tomato paste
1 lg. pkg. shells
1 pkg. Mozzarella cheese
Parmesan cheese

Mix hamburger, onion, pepper, tomato paste in bowl. Set aside. Boil shells for 5 to 7 minutes to soften. Cool shells then stuff with filling. Place in casserole dish. Cover with sauce. Top with cheese. Cover and bake at 350 degrees for approximately 1 hour.