Combine mustard, TABASCO® Soy Sauce, sherry, sugar, oil, garlic and TABASCO® Original Red Sauce in a small bowl and mix well. Place steak in a large shallow dish and add marinade. Cover and refrigerate at least 5 hours, turning meat occasionally.
Remove meat from marinade; place on grill about 5 inches above heat and brush with marinade. Grill 15 minutes, turn meat, and brush with marinade. Grill 10 minutes longer or to desired doneness.
While meat is cooking, heat leftover marinade in saucepan. Bring to a boil, reduce heat, and simmer 2 to 3 minutes. Carve meat in thin slices across grain and drizzle with marinade.
Makes 8 servings.