Sauces Marinade Sauce for Flank Steak 1 tsp. salt 1/2 tsp. pepper 1/2 tsp. basil 1/2 tsp. rosemary 1 tsp. garlic salt 2 T. wine vinegar 4 T. salad oil 1 chopped onion Marinade overnight then broil for 7 -10 minutes on each side.