Looking to transform your leftover prime rib into a mouthwatering meal? This Leftover Prime Rib Sandwich is your answer! With its perfect blend of tender prime rib, zesty horseradish sauce, and sweet caramelized onions, it’s a quick and satisfying dish ideal for busy weeknights or casual gatherings. In just five minutes, you can whip up this warm, melty delight that will impress your family and friends alike. Whether you’re enjoying a cozy night in or hosting a casual get-together, this sandwich is not only simple but also full of flavor. Get ready to savor every bite!