Found this on this BB. Gave it to friends who made it and RAVED about it.
Ed
Prime Rib Roast
1 4 to 5 lb. Boneless Beef Rib Roast
1 T Worcestershire sauce
1 t garlic powder
3 T cracked black pepper
1 box (3 lb) coarse kosher salt
1/2 c Water
2 disposable aluminum oval pans
Completely cover bottom of (doubled) pan with about half of the salt
Brush roast with Worcestershire sauce.
Rub in garlic powder and pepper all over the roast.
Place roast on top of the salt.
Using the other half of the box, cover the roast in kosher salt.
Gently drizzle 1/2 cup water over roast.
Place in preheated 500 degree oven.
Bake, uncovered, 13 to 14 min per pound for medium. (Use meat thermometer.)
DO NOT OVERCOOK!
May want to check doneness at 120 to 130 degrees internal temperature.
Crack salt covering off the prime rib, slice, and serve.
Some people cook a roast for 5 minutes per pound at 500 degrees, then turn off the oven, (or the grill) leaving the door (or lid) closed for another 5 minutes per pound.