how long to roast prime rib roast
A low and slow start delivers perfectly evenly cooked medium-rare doneness all the way from edge to center. Blasting the prime rib with heat just before serving gives you a crackling-crisp, browned crust. Yield:Serves 3 to 12, depending on size of roast. Active time: 15 minutes. Total time:4 1/2 hours to 8 1/2 hours.