Leftover Prime Rib Breakfast Sandwich

I LOVE making prime rib. We usually do a Smoked Prime Rib, and get a big roast because the only thing I love more than standing rib roast is all of the great things I make with the leftovers.

One of my most popular recipes around the holidays is my Prime Rib Barley Soup, which also uses leftover prime rib. It is delicious, so save that one for dinner and make this recipe for breakfast. Where's the beef? It is in your stomach, that's where.

Why You'll Love This Recipe

• Simple prep: Breakfast doesn't get easier than this. Slice, saute, scramble some eggs, and you're done.
• Family-friendly: Everyone loves these sandwiches.
• Great for meal prep: These are perfect for a make-ahead take-along breakfast option! Just wrap in foil and store in the fridge, then pop in the air fryer for 5 minutes before you hit the road.

Recipe Shopping List

Wondering if you have to hit the store? Here's the list of items you'll need to make this recipe. For specific amounts, please refer to the printable recipe card at the bottom of the post.

• Prime Rib – Your leftover prime rib is the star here. I like to use the rare parts so they don't overcook when being headed in the pan, but any part of the rib roast will work. You can thinly slice it or chunk it up into bite-sized pieces.
• Butter – I always cook with salted butter. If you use unsalted, you'll probably have to add a little extra salt.
• Eggs – Get the best eggs you can get your hands on. If there are farm eggs available, it is worth it. If not, use what you have, but the quality of the eggs makes a big difference!
• Milk – Whole milk is ideal. 2% works too. I wouldn't go lower than that. If you want it extra rich, toss in some heavy cream instead.
• OWYD SPG (or you can just use salt & pepper) – This is our custom salt, pepper, and garlic blend. There are hints of smoke, and the grind makes it stand out in all the right ways.
• Croissants – Fresh is best, but any grocery store croissants will do. You can also use bagels or English muffins if you prefer.
• Shredded Cheddar Cheese – I like sharp cheddar with prime rib, but you use what you prefer!
• Mayo – Duke's, Hellman's, or Best Food's if you are on the West coast.
• Horseradish – You can use prepared horseradish or just the plain stuff. It depends on how much kick you want it to have.
• Dijon – Pardon me, could you pass the Gray Poupon?

15+ Leftover Prime Rib Recipes

How To Make This Recipe

This is just the overview so you can see what you're actually getting into here. When you are cooking, you'll want to use the full recipe at the bottom of the page.

1. Prep & Preheat – Thinly slice your leftover prime rib and season it with the OWYD SPG. Add the eggs, milk, and salt & pepper to a bowl and whisk until fully combined. Slice your croissants and toast them in a 350°F oven. Put a pan on the stove over medium heat with two tablespoons of butter inside. Whisk together the mayo, horseradish, and Dijon mustard. Shred the cheese if you haven't yet.
2. Saute – Once the butter is melted, add your sliced prime rib into the pan and let it get nice and hot. Once it is heated, remove from the skillet and set aside.
3. Cook Eggs – Add some more butter to the pan and turn the heat down. Add your whisked eggs to the pan and scramble. Once scrambled, add the shredded cheese, mix, cover, and remove from the heat.
4. Assemble – Take your toasted croissants and spread some of the mayo mixture on one side. Top with a pile of the prime rib, and then heap on some of those cheesy scrambled eggs. Top with the other half of the croissant and dig in!

Prime Rib Sandwich Pinwheel

More Easy Breakfast Recipes

• Traeger Egg Bake
• Ham and Cheese Tortilla Quiche
• French Toast
• Dry Pancake Mix