"NOTE...THE INTERNAL TEMPERATURE NOT THE TIME IS YOUR BEST GUARANTEE FOR DONENESS so for a perfectly cooked prime rib roast invest in a meat thermometer and you will never go wrong with this recipe! --- if desired you may omit the au jus and just serve the roast, I prefer to make the au jus especially if I am serving this at a holiday table --- use nothing else but only fresh garlic, a little salt and lots of fresh ground black pepper for this or you could use 1 teaspoon garlic salt, using any other spices will take..."