remove the steak from the fridge at least an hour before cooking
season the steak on both sides just before cooking
on a medium heat melt the butter in your pan
let the butter foam until it is nut brown
put the steak into the pan and turn the heat up slightly
after 1 minute for a rare steak, 2 minutes for a medium rare steak and 3-4 minutes for a medium steak, turn the steak over and turn up the heat slightly
cook the steak for the same amount of time per side, then add the hot water to the pan
immediately remove the steak and allow to rest while the jus forms
lower the heat and scrape all the caramelized deposits into the jus
The steak I made was topped with some truffles which I brought back with me from Umbria
Notes
you can use this method for any cut of meat or fish you can use this to seal your meat before slow cooking if the steak has a bit of fat on the edge, line the edge up with the pan use red wine instead of water - this must be boiled for 30 seconds before you use it