Some good ways to cook prime rib are in the oven with olive oil, garlic, rosemary, salt and pepper, or slow-roasted bone-in with a salt and pepper rub. Food experts suggest that you first brown or sear the prime roast on the stove before cooking it in the oven.
Cook prime rib by unwrapping it and setting it on a cutting board prior to cooking so that it comes to room temperature. After about three hours, heat 2 tablespoons of canola oil over high-heat until its very hot, and sear the roast for seven to eight minutes. Once it develops a golden brown crust, rub it with salt and pepper to taste, and place it in a roasting rack in a pan with the fatty side up. For bone-in prime rib, set the roast on the bones.
Slow roast the prime rib at 200 degrees Fahrenheit for two and a half to five hours or when the meat thermometer reads 128 degrees. Remove the meat from the oven, and cover it with foil until the temperature drops to 120 degrees, then serve.
Prior to roasting the prime rib, you can rub it with a mixture to create a spice crust. Grind up 1 tablespoon each of green peppercorns, pink peppercorns, black peppercorns and whole allspice, and mix the spices with 1 tablespoon of salt, 2 tablespoons of flour, 2 tablespoons of olive oil, 1 tablespoon of Dijon mustard and 3 tablespoons of brown sugar. Rub the paste on the roast.