Heston Blumenthal's recommends Pampas Plains in his Steak with blue cheese recipe
Okay, so this is no flash-in-the-pan recipe. But do try my way. Source the best bit of flesh you can lay your hands on. Give yourself plenty of time - a couple of days, in fact - to slowly braise the meat and prepare the ketchup and stilton butter. Then, add a lick of bare flame, before sinking your teeth into the best steak you've ever tasted