Preheat your griddle or heavy-based frying pan until it sizzles when you add a drop of oil.Season the meat just prior to cooking.Don't overcrowd the pan.
Cook over high heat turning the steak only once after a rich, golden crust has formed, reduce heat to medium when the crust has formed - approx. 4 to 5 minutes on each side.Finish by adding a large knob of butter when frying or on the griddle.
Leave to rest in a warm place for at least 5 – 10 mins before carving.