Herb and Garlic Crusted Prime Rib Roast with Burgundy Thyme Gravy - prime rib sounds good today but is it too hot to have the oven on? Try this recipe on the backyard grill by placing the roast on indirect heat on the backyard BBQ. The charcoal or gas burners get lit on one side and the roast goes on the opposite. Shut the lid and keep the temp at 350 for succulent prime rib roast.