In this tutorial, we learn how to cook a prime rib steak on an outdoor grill. Before you begin, heat your grill up for 15-20 minutes. Now, prepare your steak by sprinkling salt and pepper on all sides of it. Now, place the steak on the grill so that it's not directly on the heat. Cook this on both sides, then add two pats of butter on the top of it when it's almost done cooking. Keep grilling the steak until it's to the temperature you prefer. When finished, let the steak sit for 10 minutes, then eat while still hot!