1 egg, beaten
1 1/2 lb. ground beef
1 c. fresh bread crumbs
1 med. onion, chopped
1 1/4 tsp. salt
1/2 tsp. pepper
2 (8 oz.) cans tomato sauce, divided
2 tbsp. firmly packed brown sugar
2 tbsp. vinegar
2 tbsp. prepared mustard
1 c. water

Combine egg, beef, bread crumbs, onion, salt, pepper and 1/2 can tomato sauce. Shape into loaf; place in large shallow baking dish. Combine sugar, vinegar, mustard, 1 1/2 cans tomato sauce and water. Pour sauce over meat loaf. Bake at 350 degrees for 1 1/2 hours.