tenderloin and prime rib roast combo from kansas city steaks kansas city steak company 2 beef tenderloin roast, known as chateaubriand, paired with a wonderful prime rib roast for three gourmet roasts to fill your home with pure beef aroma. chateaubriand is really filet mignon in roast form. the kansas city steak company offers that pure pleasure with its hand-selected prime rib roast for a combination fit for royalty.