1 1/2 lbs. ground beef
1 c. bread crumbs
1/2 c. chopped onion
1 tsp. salt
1/4 tsp. pepper
1 (15 oz.) can tomato sauce

SAUCE:

1/2 c. white sugar
2 tbsp. brown sugar
2 tbsp. vinegar
2 tbsp. mustard

Combine all ingredients with half of the tomato sauce. Shape into a loaf. Bake in 350 degree oven for 50 minutes. During last 15 minutes of cooking, combine rest of tomato sauce with sauce ingredients and cook, stirring until it comes to a boil. Drain fat from meat loaf and pour sauce mixture over it and return to oven for another 10 minutes.