2 lbs. round steak
1 c. ketchup
1/4 c. vinegar
2 tbsp. brown sugar
1 c. water
2 tbsp. Worcestershire sauce
1 tsp. yellow mustard
1 med. onion, chopped

Cut steak into serving sizes. Mix the rest of the ingredients together and pour over the round steak. Bake in 325 degree oven for 1 1/2 to 2 hours or in a crock pot for 8 hours.