Some tips for cooking a 3-pound rib roast are to use a dry rub to season it and to allow the roast to come to room temperature before cooking it. Some other tips are to use a meat thermometer and to allow the roast to sit before carving it.
The chef can massage seasonings such as salt, pepper, rosemary and garlic directly into the roast. This helps it form a flavorful crust while it cooks. After seasoning it, it's best to let the roast sit for approximately two hours, or until it reaches room temperature, before cooking. This helps it cook evenly. Using a meat thermometer ensures that the meat is cooked to a safe temperature. A rare rib roast should read at least 120 degrees Fahrenheit when the thermometer is placed into the thickest part, and it should read at least 140 degrees Fahrenheit for medium doneness. The internal temperature continues to rise for approximately 20 minutes after the roast is removed from the oven or grill.