Flat Iron steaks are very versatile.
I cut them into portion-size pieces and grill them like filet mignon steaks. I grill them whole and slice them like London Broil. I slice and grill them for steak tacos.
Grill hot and fast. Go for medium rare doneness -- no more than medium. They are tender, like tenderloin, but have more beef flavor than tenderloin, IMO.
Flat Iron steaks are one of my favorites.
CD