South Texas Steak - cooking recipe

Ingredients

4 lb. sirloin steak (1 to 1 1/2 inches thick)
1/2 c. red wine vinegar
1/2 c. brown sugar
3 Tbsp. catsup
3 Tbsp. Worcestershire sauce
1 Tbsp. prepared mustard
1 clove garlic, crushed

Preparation

Trim steak.
Cut into 8 pieces and place in a nonmetallic dish. Combine remaining ingredients and pour over meat.
Marinate for at least 2 hours or overnight.
Grill steak over hot coals 4 to 6 inches from heat, basting with marinade.
Cook 6 to 8 minutes per side for medium rare, 8 to 10 minutes per side for medium.
Heat remaining marinade and serve with steak.