Preheat the oven to 220C/425F/Gas 7 (fan 200C). Rub the fillet of beef with plenty of salt and pepper and the oil. Heat a large frying pan until very hot. Fry the fillet on all sides until browned.
Spoon the cooked vegetables into a casserole dish. Place the beef fillet onto a chopping board. Cut a pocket in the side of the fillet, leaving a 2cm/1in gap at each end. (Make sure that you only ...
Trim away the 'chain' if it is still attached, and use the meat for Beef Stroganoff. (The chain is the fat-covered portion of meat at the bottom of the tenderloin). Double over the meat at the ...