
Place the roasting pan from cooking prime rib on the stove over low heat after removing the roast from the pan. If you prefer, you can also use a separate pan to cook the beef au jus.Whisk Worcestershire Sauce and Red Wine into the dish along with drippings from the beef. If using the original roasting pan, scrape up any brown bits from the bottom of the pan for extra flavor. A wooden spoon works best for this.
Add Beef Broth or juices from the prime rib. Bring to a simmer. Serve hot with sliced prime rib, and enjoy!