Christmas Prime Rib
Ingredients: 1 (6 pound) boneless prime rib roast 2 tablespoons prepared horseradish 2 tablespoons Dijon mustard 2 teaspoons kosher salt 2 teaspoons coarsely ground black pepper 2 teaspoons dried thyme 2 teaspoons garlic powder 2 stalks celery, cut into 2-inch pieces 1 carrot, cut into 2-inch pieces 1 small unpeeled onion, quartered and separated 2... » read more