"A Leftover Prime Rib Sandwich is the best way to enjoy your prime rib roast leftovers. This recipe details how to make the best prime rib sandwich!..."
INGREDIENTS
•
2 tbsp butter
•
2 large yellow onions (sliced thin)
•
2 tbsp mayonnaise
•
1 tsp creamy horseradish
•
16 cloves roasted garlic
•
2 cups arugula
•
1 tsp olive oil
•
1 tsp white balsamic vinegar (or lemon juice)
•
8 slices sourdough (or large baguette, sliced)
•
12 ounces prime rib (sliced thin)