Thus, the deli's sandwiches will be more consistent ... Cook to an internal temperature of 125 degrees [Fahrenheit] for great rare roast beef. Let the meat rest before slicing it." ...
A big joint of roast beef is real treat and you ... and tuck the two pieces of onion in close to the meat. The onion will caramelise as the beef cooks and give a lovely flavour to the gravy.