Ingredients
1 1/2 lb steak (flank?)
2 cloves garlic, finely chopped or minced
ground black pepper
1 cup balsamic vinegar
2 tbsp butter
Trim steak of excess fat. Rub steak with garlic and pepper. Place steak into a glass baking dish and pour vinegar over steak. Marinade steak for 20-30 minutes, turning steak every 10 minutes. Remove steak from marinade and pat dry with paper towel.
Grill or broil steak to desired degree of doneness. Pour marinade into saucepan and simmer over medium-high heat until liquid is syrupy. Add 2 tbsp cold butter to syrup and swirl to melt. Slice steak across the grain in thin slices and serve with balsamic sauce.
