Wipe the meat and trim neatly. Crush the peppercorns in a basin using the end of a rolling pin, with a pestle and mortar, or on a board under a heavy weight.
Using the fingers, press the crushed peppercorns into the surface of the meat on both sides. Heat the butter and oil in a frying pan and when frothing add the steaks. Cook fairly quickly for the first few moments and turn the steak