Pat the prime rib dry with paper towels. This helps create a better sear.
Rub the entire roast with olive oil, then season generously with kosher salt, black pepper, minced garlic, and chopped rosemary.
Place the prime rib, bone-side down, on a rack in a roasting pan.
Roast at 450°F (230°C) for 15 minutes to sear the outside.
Reduce the oven temperature to 325°F (160°C) and continue roasting until the internal temperature reaches your desired doneness (120-125°F for rare, 130-135°F for medium-rare, 140-145°F for medium). A good rule of thumb is about 13 minutes per pound for medium-rare.
Remove the prime rib from the oven and let it rest, loosely tented with foil, for at least 20-30 minutes before carving. This allows the juices to redistribute, ensuring a tender and juicy roast.
Notes
For a more intense garlic flavor, you can insert whole garlic cloves into the roast before seasoning. Always use a meat thermometer to ensure perfect doneness.