PRIME RIB ROAST WITH MUSTARD HORSERADISH SAUCE

Steps:

• Two hours before roasting, remove the meat from the refrigerator and allow it to come to room temperature.
• Preheat the oven to 500 degrees F (see note).
• Place the oven rack on the second lowest position.
• Place the roast in a pan large enough to hold it comfortably, bone-side down, and spread the top thickly with the salt and pepper.
• Roast the meat for 45 minutes.
• Without removing the meat from the oven, reduce the oven temperature to 325 degrees F and roast for another 30 minutes.
• Finally, increase the temperature to 450 degrees F and roast for another 15 to 30 minutes, until the internal temperature of the meat is 125 degrees F.
• (Be sure the thermometer is exactly in the center of the roast.) The total cooking time will be between 1 1/2 and 1 3/4 hours.
• Meanwhile, make the sauce.
• Remove the roast from the oven and transfer it to a cutting board.
• Cover it tightly with aluminum foil and allow the meat to rest for 20 minutes.
• Carve and serve with the sauce.
• Note: Be sure your oven is very clean before setting it at 500 degrees F.
• For Mustard horseradish sauce: Whisk together the mayonnaise, mustards, horseradish, sour cream, and salt/pepper in a small bowl.