Some like rib roast and tenderloin are well known enough that you probably have a good idea of what you're getting into, but ...

Sprinkle roast with salt, thyme, garlic powder and ground pepper. Cover and refrigerate at least 8 hours or up to 24 hours. Meanwhile, in a saucepan, saute onion in 1 tablespoon oil until tender ...

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 ...