Prime Rib Leftover Sandwich

Instructions

1. Slice the prime rib into very thin strips against the grain for maximum tenderness.
2. Sauté sliced onions in a pan with a little butter until golden brown and caramelized.
3. Butter the inside of the hoagie rolls and toast them in a skillet until golden and crisp.
4. Whisk together the horseradish sauce and mayonnaise in a small bowl and spread onto the toasted bread.
5. Layer the prime rib and caramelized onions onto the bottom half of each roll.
6. Place a slice of provolone cheese over the meat and onions, then melt under the broiler for 1 minute.
7. Warm the au jus in a small saucepan or microwave and serve it in a side dish for dipping.

Tips

• Avoid overcooking the meat when reheating; a quick dip in hot au jus is usually enough.
• Use a crusty bread like ciabatta to prevent the sandwich from getting soggy.
• Add a dash of Worcestershire sauce to your onions while cooking for an extra flavor boost.