Prime rib is one of my favorite cuts of meat. At my first job as a teenager, we made prime rib for Saturday and Sunday dinner. It was always a treat if there was any leftover on Sunday night. I can still remember my first bite of that tender, juicy cut of meat. How could it be this delicious? What had I been missing for my first 14 years of life?

We started making this after my husband came home from a work trip in Fort Wayne Indiana. He was so impressed with the sandwich and said we have to make this! I’m glad he did- it’s delicious!

This is made with our fresh, soft hoagie rolls, freshly prepared creamy horseradish sauce, sweet caramelized onions, seasoned leftover prime rib, and, of course, cheese! The prime rib can be made at home for dinner earlier in the week or bought already cooked. We have a great deli nearby that sells excellent cut prime rib. This is the route we usually take.

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Prime Rib Sandwiches

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Servings 4 Sandwiches

Ingredients

Creamy horseradish sauce

1/2 cup Sour cream
3 tbsp Mayonnaise
2 tbsp Horseradish
1 tbsp Apple cider vinegar
1/8 tsp Mustard powder
1/8 tsp Onion powder
1/8 tsp Cayenne pepper
1/8 tsp Sea salt
1/8 tsp Black pepper

Beef and onions ingredients

2 lbs Cold leftover Prime rib
1 tbsp Blackened seasoning
1/8 tsp Sea salt
1/8 tsp Black pepper
1 cup Sliced yellow onion
2 tbsp Butter

Hoagie roll ingredients

4 Hoagie rolls
4 tbsp Butter
Garlic salt

Cheeses

12 slices Provolone cheese
1/2 cup Blue cheese crumbles

Instructions

Creamy horseradish sauce

In a medium sized mixing bowl, combine sour cream, mayonnaise, horseradish, apple cider vinegar, mustard powder, onion powder, cayenne, salt, and pepper.
Cover and refrigerate for 30 minutes.

Caramelized onions and prime rib instructions

Cut the extra fat off of the prime rib and cut meat into slices or cubes.
Season the beef with blackened seasoning, salt and pepper.
Melt the butter in a medium sized cast iron skillet over medium heat.
Add onions to the skillet and sauté until soft and caramelized.
In the same skillet, lightly sear the prime rib slices just enough to re-warm the beef.

Hoagie roll instructions

Set the broiler on the oven to high.
Cut the hoagie rolls in half lengthwise, spread the butter on the cut side of the rolls and sprinkle garlic salt over the butter.
Broil until all the butter is melted and the bread is toasted.

Constructing the sandwiches

Spread the warm prime rib slices onto the hoagie rolls.
Evenly distribute the onions on top of the beef.
Add the blue cheese to each sandwich and top with 3 slices of provolone per sandwich.
Replace the top bun on the sandwich.
Wrap each sandwich in paper towel and microwave for 25-30 seconds each to melt the cheese.
Cut the sandwiches in half and serve with the creamy horseradish sauce in a small ramekin on the side for dipping.