1 1/2 lbs. ground beef
1 c. seasoned bread crumbs
1 med. onion, chopped
1 (16 oz.) can Hunt's tomato sauce, divided in half
1 egg, beaten
Seasoning salt (to taste)
Pepper (to taste)

Lightly mix ingredients (using the half tomato sauce) and form into loaf shape. Place in a 9 x 13-inch pan.

SAUCE:

Remaining 1/2 tomato sauce
1 c. water
2 tbsp. prepared mustard
2 tbsp. cider vinegar
2 tbsp. brown sugar