Whisk together until thickened and well blended. Pour over flank steak and pierce steak all over on both sides. Marinade steak for 12 to 24 hours. Barbeque for a total of 8 to 10 minutes. To serve, slice thinly across the grain.
Per serving: 1689 Calories; 164g Fat (85% calories from fat); 4g Protein; 61g Carbohydrate; 0mg Cholesterol; 4119mg Sodium