Recipe video above. The juiciest, tastiest, BEST roast beef in the world is Prime Rib!! Also known as Standing Rib Roast, this is slathered in a herb and garlic butter, then roasted to juicy perfection. By using a lower but not super low oven temperature, we can be assured of a beautiful even cook throughout the whole roast, yet still have it on the table in a couple of hours. Bonus: lower temp = more forgiving! Meat thermometer is a MUST!