Loaf:

1 1/2 lb. lean ground chuck (may substitute 1/2 lb. ground pork)
1 c. fresh bread crumbs
1 onion, chopped
1 egg
1 tsp. salt
1 tsp. pepper
1/2 (15 oz.) can tomato sauce

Sauce:

1/2 (15 oz.) can tomato sauce
1/2 c. water
3 tbsp. vinegar
3 tbsp. brown sugar
2 tbsp. prepared mustard
2 tsp. Worcestershire sauce

Preheat oven to 350°F. Mix ingredients for loaf. Shape into loaf in rectangular pan.

Combine ingredients for sauce. Spoon sauce over loaf.

Bake 1 1/2 hours.