Electric roasters allow you to cook foods that you would normally cook in a traditional oven without heating up the kitchen. They are also a game-changer when preparing large meals where much of the food must be cooked in the oven as you can cook your turkey in the roaster, freeing up the regular oven for other items. Prime rib is another food that can be cooked to perfection inside a roaster oven.
Preheat the roaster to 162 degrees C.
Place the prime rib roast on the roasting rack that came with the roaster.
Season the roast with salt and pepper to taste. If desired, sprinkle the prime rib with up to six cloves of minced garlic, 1 to 2 tsp thyme or rosemary or 1 tbsp steak seasoning. Press the seasonings into the roast with your hands.
Place the rack with the meat into the cooking well of the roaster oven. Cover the oven with the lid.
Cook the prime rib roast for 13 to 15 minutes per pound. Insert a meat thermometer into the roast to check for doneness. A rare roast is ready when the temperature is 54.4 degrees Celsius, a medium roast will read 140 and a well-done prime rib will read 150 on the thermometer.