This video shows you how to make grilled skirt steak marinated with Marsala wine, the slightly sweet fortified wine from Sicily. Along with the wine, you’ll add dry rosemary, a touch of ketchup (for its sweet and sour aspect), and minced garlic. It’s super easy. Let it marinate, and then grill over mature, white-hot coals. Watch the video, then get the recipe for Chef John’s Marsala Marinated Skirt Steak. For best results, don’t forget to slice it against the grain.