1. preheat broiler
2. Combine soy sauce, vinegar, ginger and garlic in small bowl.
3. Thread steak on 8 (10 inch) skewers by piercing each strip in several places so that it lies flat.
4. Brush the kebabs with 1/2 the soy sauce and broil 4 inches from the heat 3 minutes. Turn and brush with remaining sauce. Broil until cooked through, about3 minutes longer.