Flank steak is a lean, somewhat tough but flavorful cut of beef that benefits from the tenderizing effects of a marinade. It is best cooked medium rare and thinly sliced at an angle across the grain of the meat.
Prepared this way, marinated, cooked quickly at high heat, thinly sliced, flank steak practically melts in your mouth. This recipe calls for grilling the steak, but if you don’t have a grill, you can prepare the steak on a large cast iron frying pan as well.
Source:: Simply Recipes