1 1/2 lbs. ground beef
1 c. bread crumbs
1 med. onion (chopped)
1 1/2 tsp. salt
1/8 tsp. pepper
3/4 c. water
1 1/2 tsp. sugar
2 tbsp. prepared mustard
1 tbsp. wine vinegar
1 (8 oz.) can tomato sauce
1 lg. egg (beaten)

Mix beef, bread crumbs, onion, sugar, 1/2 can tomato sauce, egg, salt and pepper. Mix mustard, vinegar and water; add to beef mixture and mix well. Place in baking pan and add remaining tomato sauce to top. Bake 350 degrees 1 1/4 hours. (Let cool slightly before slicing.)