1. In a blender or food processor, combine soy sauce, olive oil, garlic, brown sugar, vinegar, ginger and ground pepper. Purée until smooth.
3. Return to room temperature.
4. Preheat gas grill on medium high.
5. Grill steak covered for 5 min. on first side. Turn the steak over and grill covered about 4 minutes longer for medium rare.
6. Transfer steak to a platter and cover tightly. Let stand for 10 min.
7. Holding a sharp knife at a 45 degree angle, cut steak across the grain into thin slices.