This recipe both tenderizes and seasons the meat considerably. The steak is marinated overnight, uncooked, then quickly broiled. The rare, thinly sliced pieces are then marinated a second time, with olive oil, feta cheese, lemon juice, peppers and onions. Serve the savory slices of steak and vegetables on crusty rolls, with plenty of the feta marinade, or serve them as a salad, atop a bed of mixed greens. Prep time does not include marinating.