Instructions: * Each flank steak should weigh between 1 and 1 1/2 lbs. Place beef steaks in shallow glass or plastic dish. Mix remaining ingredients and pour over the beef. Cover and refrigerate at least 8 hours, turning occasionally. Set oven control to broil. Place beef on rack in broiler pan. Broil with the tops about 3 inches from the heat until brown, about 5 minutes.

Turn beef and broil about 5 minutes longer. Cut beef in thin strips across the grain of the meat. Serve with tortillas and guacamole if desired.

If you would like to email yourself the recipe for later use, or share the recipe with your friends or family, enter the email addresses below and this recipe will be emailed to you and others as well.