TWO BONE PRIME RIB RECIPES

Steps:

• Mix up 1 tablespoon + 1 teaspoon each of onion salt, seasoned salt, and garlic powder, for a total of 1/4 cup of seasoning mix.
• Pat the seasoning mix on both ends of the roast as well as the fat side. (The salt may not stick as well on the fat side, but don’t worry about it.)
• Set the seasoned roast on a roasting rack, bone-side down and fat-side up. Place the rack in a large roasting pan, and insert your meat thermometer into the middle of the roast.
• Place the roast into a 500° preheated oven, uncovered, and cook for 5-6 minutes per pound.
• Then shut the oven off completely, and DO NOT OPEN THE OVEN DOOR FOR TWO HOURS. 
• After two hours, check the temperature of the meat. If your thermometer reads 135-140°F, it’s done! (If it isn't quite to temp yet, just put it back in the oven at 375°F until it's done.)
• Creamy Horseradish Sauce

Steps:

• For the prime rib: Use the tip of a knife to make slits in the fat of the prime rib and stuff with slices of garlic. In a small bowl, mix the salt and pepper. Create a crust of salt and pepper all over the meat. Let stand at room temperature for 30 minutes.
• Preheat the oven to 450 degrees F. Put the prime rib on a rack in a roasting pan.
• Roast the meat for 10 minutes at this temperature, then turn the oven down to 350 degrees F. Roast until the meat registers 120 degrees F on an internal meat thermometer for a medium-rare roast, 1 hour 30 minutes to 1 hour 45 minutes (about 15 minutes per pound). Remove the meat to a cutting board, loosely tent with foil and let stand 20 minutes. 
• For the gravy: In the meantime, pour off most of the fat from the roasting pan, leaving about 1/4 cup. Put the roasting pan on top of the stove over medium heat. Whisk the flour into the fat and cook for 2 to 3 minutes. Vigorously whisk in the beef stock and mustard. Add the thyme, rosemary and garlic. Bring to a low boil, then reduce the heat to a simmer. Cook, whisking, until the mixture begins to thicken. Add the sherry vinegar and cook 1 more minute. Transfer to a serving dish. 
• Remove the ties from the prime rib. Slice the prime rib and bones and serve with the gravy.