Set your prime rib roast on the counter one hour before you begin preparing it
After your roast as set out for an hour, set your oven temperature to 450 degrees.
Set your roast on the roasting rack, and place a meat thermometer in the middle in the thickest part of the meat.
Generously cover the top of the roast with kosher salt.
Once the oven reaches 450 degrees, put the roast in the oven so thermometer is facing the front and can easily be seen.
Cook for 15 minutes, as this will brown the outside of the roast.
After 15 minutes, reduce the oven temperature to 325 degrees. Plan for your roast to cook for 15 minutes per pound.
Cook your roast to 5 to 10 degrees less than you want your final temperature. Remove from oven, tightly cover in foil, and let your roast rest.
Let it rest 15 to 20 minutes. The temperature will rise 5 to 10 degree during this resting period.
Once the roast as reached the desired temperature, remove the foil and thermometer.
Place on a serving platter, slice, and enjoy.