Roast for 23 minutes for medium-rare (only 20 minutes if it is a long, thin piece). When the beef is cooked, remove from the oven, cover with aluminium foil and leave to rest for 15 minutes.
For the roast beef, heat the oil in a roasting tin on the hob. Seal the sirloin all over including the ends. Set aside in the roasting tin. Preheat the oven to 220C/200C Fan/Gas 7. Meanwhile mix ...
The best joints for roast beef are a Rib of Beef, Sirloin or Fillet. Rib - better even, Prime Rib - works well, as it will be cooked on the bone. Keeping the bone in makes for a tastier piece of ...