In a small bowl, combine the garlic, black pepper, kosher salt, thyme, and rosemary with the canola oil.
After giving the prime rib a thorough rub, let it sit for an hour to allow the meat to come to room temperature.
Preheat the oven to 450°F.
Arrange the prime rib in a roasting pan, fat cap side up.
Insert your meat thermometer as far as possible into the side of the roast, being careful not to contact the bones.
Reduce heat to 325 degrees after cooking at 450 degrees for 20 minutes.
Depending on the size of your roast and the reading on your meat thermometer (125–130 degrees is the ideal range), cook for a further 90 minutes to 2 hours.
I baked my almost seven-pound prime rib for an hour and forty minutes, then allowed it to rest for twenty minutes.
Top with a gremolata and serve.