In a blender or food processor process soy sauce, sesame oil, wine, brown sugar, and ginger until thoroughly combined. Brush lettuce with this marinade. Place lettuce; cut sides down, in centre of cooking grate. Grill 5 to 7 minutes, turning and brushing with marinade halfway through grilling time. Makes 6 servings. Grilled romaine can be served as a green vegetable with your meal.