Cooking
(oven): If frozen, thaw completely in refrigerator. Let roast sit at room temp. for 2 hours before cooking. Preheat oven to 450F/230C. Unwrap prime rib and place in a roasting pan, fat side up (discard foil pan). Sprinkle all over with Montreal Steak Spice (included). Roast, uncovered, 15 min. Turn oven temp. down to 325F/163C. For medium rare, continue roasting approx. 2 hours, OR until cooking thermometer registers 125F/52C. Remove from oven and let sit 15-20 min. before carving. Serve with Au Jus and Horseradish Sauce.

Ingredients
Prime Rib Roast, beef broth, Dijon mustard, horseradish sauce, Montreal Steak Spice, canola oil, soy sauce, cornstarch, garlic powder, Worcestershire sauce, onion powder, basil, oregano, thyme, parsley, summer savory, pepper, sage, cayenne pepper, marjoram