Korean Steak

In large self-sealing plastic bag, combine soy sauce, sugar, ginger, vinegar, sesame oil, ground red pepper, and garlic; add steak, turning to coat. Seal bag, pressing out excess air. Place bag on plate; refrigerate steak 1 to 4 hours to marinate, turning once. Just before grilling steak, prepare rice as label directs; keep warm. Remove steak from bag; reserve marinade. Place steak on grill over medium heat and cook 14 to 15 minutes for medium-rare or until of desired doneness, turning steak over once. Transfer steak to cutting board; let stand 10 minutes to allow juices to set for easier slicing. In 1-quart saucepan, heat reserved marinade and 1/4 cup water to boiling over high heat; boil 2 minutes. To serve, thinly slice steak. Let each person place some steak slices, rice, green onions, and sesame seeds on a lettuce leaf, then drizzle with some cooked marinade. Fold sides of lettuce leaf over filling to make a package to eat out of hand.