Ingredients
¼ c. balsamic vinegar
1 T. Worcestershire sauce
2 tsp. dark brown sugar
1 garlic clove, minced
1 lb. flank steak
salt and pepper
Instructions
Combine first four ingredients in a large ziplock bag. Add steak, turn to coat; marinate for 30 minutes at room temperature.
Grill until desired doneness. Let stand, covered loosely with foil for 10 minutes, before cutting in thin strips against the grain.
Source : Allrecipes