2 lb. ground beef
2 tbsp. butter
Salt
Pepper
1/2 c. ketchup
1/4 c. white vinegar
1 onion, chopped
1 tbsp. prepared mustard
1 tbsp. Worcestershire sauce

Form 6 oval patties from ground beef. Brown in butter and season with salt and pepper. Pour off excess fat. Mix remaining ingredients and pour over meat. Cover and cook 8 to 10 minutes or until done as desired.