Combine all ingredients in a gallon size ziptop bag. Add steak and marinate about one hour. Remove steak from bag and reserve marinade. Grill over medium heat for about 20-30 minutes, flipping sides occasionally until you achieve desired doneness..
For dipping sauce, add reserved marinade to small saucepan. Bring to boiling and simmer for about 10 minutes so that juices are cooked. Serve over cooked flank steak.
FREEZING INSTRUCTIONS: If you are freezing first, label bag, then add marinade ingredients and steak. Close bag and put in the freezer. To prepare, thaw and cook as directed above.