Prep Time: 15 minutes

Cook Time: 20 minutes

Total Servings: 2 Servings

Get ready to experience a sandwich that's a cut above the rest.

Our Prime Rib Sandwich recipe will take your taste buds on a journey of gourmet delight.

With succulent prime rib, a medley of fresh and flavorful ingredients, and an easy-to-follow method, this recipe is designed to impress.

Juicy prime rib being cut with a fork and a knife!
Our Favorite Prime Rib Sandwich: The Ultimate Recipe!

Perfect for lunch or a special dinner, this prime rib sandwich is not just a meal, it's an experience.

Prepare to fall in love with every delicious bite!

Prime Rib Sandwich Ingredients:

  1. 12 oz. Prime rib (pre-cooked)
  2. 1/2 teaspoon Kosher salt
  3. 1/2 teaspoon Ground pepper
  4. One Yellow onion, thinly sliced
  5. Four teaspoons canola oil (divided)
  6. Six slices provolone cheese
  7. Two Tablespoons Butter (softened)
  8. One teaspoon minced Garlic
  9. One tablespoon horseradish sauce
  10. Four tablespoons mayonnaise
  11. One baguette cut in half and sliced

Prime Rib Recipe Instructions:

Man cutting open a prime rib while being grilled.

Prepare The Ingredients

We all know that the first step in cooking any meal is the preparation phase.

To start your going to want to have your prime rib pre-cooked.

Whether it was cooked on a grill, smoker or oven it doesn't matter for this recipe, as long as it was cooked to your liking.

This means if you have any leftover prime rib from a previous meal, you'll be saving yourself some time with this recipe!

Cut your pre-cooked prime rib into thin strips, and well you are at it, go ahead and cut up your onion into thin pieces as well.

Jars filled with natural ingredients for cooking.
Prepare The Ingredients:

Next, you'll want to measure out your spices, oil, butter, garlic, horseradish sauce and mayonnaise to they are ready to go for the next steps!

Lastly, for preparation, all you will need to do is add two teaspoons of canola oil to a frying pan on medium heat and slice your baguette.

Cook The Onions

After your skillet is ready, go ahead and add your onions!

While the onions are cooking you'll want to stir them often assuring that you do not overcook them.

The goal is to achieve sweet caramelized onions, that burst with flavor in every bite.

Onions in oil being caramelized! Onions for the prime rib sandwich recipe.
Cook The Onions

If your sliced onions start to stick to your pan, you can deglaze them by adding a tablespoon of balsamic vinegar and stirring again.

Once your onions are done to your liking, transfer them into a bowl and set aside.

Add The Seasoning

Now it's time to season your thinly sliced prime rib!

Take your rib meat and place it onto a cutting board or large plate.

Chef adding the seasoning to their sliced prime ribs!
Add The Seasoning:

Grab your kosher salt and ground pepper and evenly add both onto your prime rib and let sit for a minute or two.

(Note: this step is optional if your prime rib was already seasoned with a dry rub or marinade)

Cook The Prime Rib

Now you're going to want to cook the star of the dish!

First, add the remaining two teaspoons of canola oil to your frying pan and bring it to medium-high heat.

Add your prime rib and cook until slightly browned, be sure not to overcook.

Perfectly cooked prime rib, getting sliced.
Cook The Prime Rib:

Once the rib is cooked to perfection, you can add your caramelized onions back into the pan, and bring the heat down to low, keeping everything warm without the risk of burn.

Divide the rib and onion mixture into two portions.

Melt The Cheese

It's time for the cheese!

Take out your six slices of provolone cheese and split it so each portion of rib gets three pieces of cheese.

While the prime rib is still on low heat, add the cheese evenly on top, so the cheese can get properly melted!

Very melty and gooey sandwich with melted cheese. Looking delicious!
Melt The Cheese:

If you wish, feel free to add a lid on top of the pan and let sit for 3-5 minutes while the cheese infuses with the rest of the ingredients.

Once the cheese is melted to your preference, turn off your heating elements completely.

Assemble Your Prime Rib Sandwich

Finally, the moment we've all been waiting for... assembly!

Grab your sliced baguettes and open them up so the inside of the bread is facing up.

Combine the softened butter with the minced garlic in a bowl and spread an even coat of the garlic butter on one half of your sandwich.

Prime rib sandwich fully assembled and ready to eat!
Assemble The Sandwich:

Next, take the mayonnaise and spread an even layer on the other half of the baguettes.

Once you've added your condiments to the baguettes, take a clean spatula and scoop each portion of prime rib into the bread evenly, ensuring accurate serving sizes.

Now add your horseradish sauce evenly into each sandwich. And now there are only two more simple steps. Serve and enjoy!

Storing Leftover Prime Rib Sandwiches

If you don't finish your whole sandwich, don't worry because we have a solution!

A very simple way of storing a leftover prime rib sandwich is to tightly wrap it in aluminum foil and refrigerate it for up to 4 days!

The nice thing about this method is that you can reheat prime rib sandwiches easily in an oven or an air fryer.

Leftover prime  rib sandwich with dipping sauces!
Storing Leftover Prime Rib Sandwiches

We don't recommend freezing pre-made sandwiches such as our recipe here.

You can also place the leftover sandwiches into an airtight container for storage in the fridge.

Prime Rib Sandwich Nutritional Facts

(Per Serving)

Calories: 1300

Fat: 115g

Carbs: 90g

Protein: 70g

Disclaimer: The data listed above is an estimate and not a guarantee.

The Best Prime Rib Sandwich Recipe

To conclude this delicious recipe, we would like to thank you for taking the time to read through our content!

We hope you found this article useful and entertaining.

Prime rib sandwich plated and ready to be eaten!
The Best Prime Rib Sandwich Recipe

Now that you know what to do with your leftover prime rib roast, what's stopping you from creating another amazing dish?

Take advantage of our recipe and go cook to impress!

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