Prepare the Prime Rib:

1. Season the Meat: In a small bowl, combine olive oil, minced garlic, rosemary, thyme, salt, pepper, onion powder, and garlic powder. Rub this seasoning mixture all over the prime rib, making sure to coat every surface of the roast.
2. Let the Meat Sit: Let the seasoned prime rib sit at room temperature for 30-60 minutes. This helps ensure more even cooking.

Roast the Prime Rib:

3. Preheat the Oven: Preheat your oven to 450°F (232°C).
4. Sear the Roast: Place the prime rib roast on a rack in a roasting pan, fat side up. Roast the prime rib at 450°F (232°C) for 15 minutes to create a nice crust on the outside.
5. Reduce the Temperature: After 15 minutes, reduce the oven temperature to 325°F (163°C). Continue roasting the prime rib for about 2.5 to 3 hours, or until a meat thermometer inserted into the center of the roast reads 120-125°F (49-52°C) for rare, 130°F (54°C) for medium-rare, or 140°F (60°C) for medium.
6. Check the Temperature: Begin checking the temperature 30 minutes before the expected cooking time to avoid overcooking.

Rest the Roast:

7. Rest the Meat: Once the roast reaches your desired temperature, remove it from the oven and tent it loosely with foil. Let it rest for 30 minutes before slicing. This allows the juices to redistribute, ensuring a juicy roast.

Slice and Serve:

8. Carve the Roast: After resting, slice the prime rib against the grain into thick slices.
9. Serve: Serve the prime rib with your favorite side dishes, such as roasted vegetables, mashed potatoes, or a fresh green salad.