We always fix a prime rib for Christmas. I usually get about a 6-7 lb. bone-in roast for 5 people. I like to make sure we have plenty and as others have said the leftovers (if any) are good. I bake potatoes with the roast and use the oven on then oven off then oven on again method and always have great results.
Chris and Jane
2013 Open Range Journeyer JT337RLS
2006 Dodge Ram 3500, 4x4, Crew Cab, DRW, 5.9 turbo diesel
1996 Harley Davidson Electraglide