Instructions: Rinse flank steak with water, dry and put in a large dish. In a bowl, mix dry mustard with red wine vinegar and whisk well. Add other ingredients and mix well. Pour marinade over meat, cover, and refrigerate, basting and turning often. Or place meat in a heavy, large plastic bag, add marinade and refrigerate, turning bag several times. Marinate at least 4 hours or overnight.

Cook by barbecuing or broiling 4-5 minutes on each side for medium rare. Or leave steak in marinade and roast in a 350-degree oven for 20-30 minutes. Slice thin on the diagonal.

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