prime rib sandwich

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!

Leftover Prime Rib Sandwich

tbsp butter

onions

mayonnaise

horseradish

garlic

arugula

olive oil

tsp white balsamic vinegar (or lemon juice)

sourdough (or large baguette, sliced)

prime rib (sliced thin)

To caramelize onions, melt butter in skillet over medium high heat. Add sliced onions, arrange in single layer, and don't stir until they start to brown. Gradually reduce heat to prevent burning and only stir when they start to brown too much. Continue cooking until a dark caramel color forms. Set aside.

To make spread, combine mayonnaise and horseradish. I chose to set my roasted garlic cloves directly on the sandwich but you can mash and mix with the horseradish mayo, if you prefer.

In small bowl, dress arugla greens with olive oil and vinegar. Season with salt and pepper, if desired.

To serve, layer sandwich with spread, dressed arugula, prime rib and caramelized onions. Serve cold.

If you have leftover prime rib roast, this is a delicious way to make use of the prime rib leftovers. My Prime Rib sandwich is loaded with slices of tender, juicy, medium-rare seasoned prime rib and topped with warm caramelized onions and mushrooms. Finished with a slathering of horseradish sauce.

lb leftover prime rib

onion

oz mushrooms (sliced)

baguette (or hoagie rolls)

au jus

horseradish sauce (*see recipe)

Prepare your horseradish sauce by mixing the sauce ingredients together in a small bowl and refrigerate until needed.

Melt 2 tablespoons of butter in a large skillet.

When the butter is melted, add the sliced onions and mushrooms to the pan.

Saute the onions and mushrooms over high heat until they begin to brown. Let them cook for 3-5 minutes without moving them around, so they have a chance to begin the caramelization process.

Turn the mushrooms and onions over and reduce to medium heat and let them continue to cook for another 5-7 minutes. Stir them around during this part of the process..

While the mushrooms and onions are cooking, trim the leftover prime rib. Remove the bone and extra fat from the edges of the meat. Take out any fat deposits from the middle of the beef ( I took this picture before removing the piece of fat in the middle)

Sliced the baguette in half log ways so you make a top and bottom.

Slather a good amount of creamy horseradish sauce on the bottom side of french bread.

Add a good handful of arugula (the peppery flavor of arugula improves the overall flavor of the sandwich.

Place thinly sliced prime rib on top of the arugula ( I like to fold the meat, setting it side by side so it’s not just lying on top of each other).

Add the caramelized onions and mushrooms to the sandwich.*Add a few slices of provolone cheese (or swiss cheese) to the sandwich for additional flavor. If you want melted cheese, add the slices before the warm mushrooms and onions, and the heat will help melt the cheese

Cover with the top of the baguette and cut into sandwiches. Serve with hot au jus and extra horseradish sauce.

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Leftover Prime Rib Sandwich

Leftover Prime Rib Sandwich

Top 2 prime rib sandwich recipes from across the web

The most viewed prime rib sandwich recipes by Recipe Cart users, saved from over 6,000 sites. Or, go to our Recipe Search Engineic_arrow_forward_48px

Top Tags

Leftover Prime Rib Sandwich

Leftover Prime Rib Sandwich

The most viewed prime rib sandwich recipes by Recipe Cart users, saved from over 6,000 sites. Or, go to our Recipe Search Engine