As always when grilling steak
, it is important to allow the meat to warm up before we throw it on the grill so that it cooks evenly. Allow your flat iron steak to sit on the kitchen counter for around 30 - 45 minutes prior to grilling. This is a good time to rub it down with the pepper and if desired, let it sit in just enough Worcestershire sauce to cover the bottom of the plate. If using the sauce, flip it once after about 20 minutes.