Let prime rib sit room temperature for 4 hours.
Few minutes before cooking, bone and tie the meat (optional)
Cut 1/2" slits on top of roast, put in garlic.
Rub roast with olive oil.
Combine rosemary, thyme, salt, pepper, onion powder, garlic powder. Spread on roast.
Let rest and have oven heat up to 500 degrees F.
Put roast in roasting pan bone side down.
Insert thermometer in the center of roast, place in oven.
Cooking time, 5 minutes per pound.
After cooking time is up, turn the oven off but DON'T OPEN THE DOOR.
After 2 hours roast will be 135 degrees F, and medium rare.
Remove from oven and let rest for 10 minutes.