Pulse to form a smooth pureé. Dip the ribs into the sauce then place into a roasting tray and spoon some more sauce over the top. Place in the oven with the potatoes for 15-20 minutes until sticky.
Serving prime rib with a zesty sauce that cuts through its inherent richness is a flavorsome way to solve this problem. In our eyes, the best of the bunch is a tangy and aromatic dill sauce.