Prime Rib Sandwich (Use Any Leftover Roast Beef)

Prime Rib Sandwich (Use Any Leftover Roast Beef)

Delicious prime rib sandwich using leftover Prime Rib Roast. You can use any leftover roast beef, from Prime Rib Recipes, you have on hand. Serve with a side of Prime Rib Au Jus.

Course Dinner, Lunch

Cuisine American

Keyword Caramalized Onions, Garlic Bread

Prep Time 20

Cook Time 35

Total Time 55

Servings sandwich

Calories 1665kcal

Author Darcey Olson

Cost $5

Ingredients

CARAMELIZED ONIONS:

2 tbsp unsalted butter *Note 1
1 small onion, thinly sliced
1 tsp apple cider vinegar

GARLIC BREAD:

1 French sub roll *Note 2
2 tbsp unsalted butter, softened
2 cloves garlic, minced

SANDWICH:

2 slices provolone cheese
1 slice leftover prime rib, ¼-½ inch thick *Note 3
1 batch horseradish sauce *Note 4
1 batch prime rib au jus *Note 4

Instructions

Pre-heat a medium-size sauce pan over medium heat.
Add the butter. Once melted, add the onions and toss to combine. Cover and let the onions cook, uninterrupted, for 5-6 minutes. Remove the lid, and stir for 1 minute.
Turn the heat to low (towards the high-end of low) and stir every 6-7 minutes for 30-35 minutes, or until the onions are dark brown. Add the vinegar and use a wooden spoon to deglaze, making sure to scrap up the brown bits on the bottom of the pan. Cover and set aside.
When the onions are close to finishing, pre-heat the oven to high broil.
Add ¼ cup of au jus to a large skillet and turn the heat to medium-high. Once simmering, turn the heat to medium. Add the slice of prime rib and let cook for 1 minute per side. Remove and place on a paper towel lined plate. (*Note 5)
Cut the bread in half (lengthwise) and place on a baking sheet. Add the butter and minced garlic to a small bowl and mix to combine. Evenly spread the garlic butter mixture over the rolls.
Broil for approximately 3-4 minutes, until your desired brownness is achieved. Remove from oven.
Layer the cheese across the bottom piece and broil for 1-2 minutes, or until the cheese is melted.
Top the cheese with the warm slice of prime rib and caramelized onions. Lather the other piece of bread with horseradish sauce and place on top of the bottom half.
Serve with the warmed au jus and enjoy immediately.

Notes

Note 1 - You can use salted butter, if that's what you have.

Note 2 – You can also use Hoagie Rolls, pre-made garlic bread, large French bread, ciabatta, or any other sturdy bread.

Note 3 – Any leftover prime rib will work well. Keep in mind the prime rib rub utilized will influence the final flavor of the sandwich.

Note 4 – You can use homemade or store bought for the horseradish sauce or au jus.

Note 5 – Total time will depend on the thickness of the prime rib slices. Also keep in mind when you dip the sandwich in the hot au jus it will further heat up the beef.

The nutritional calculations do not include any added salt, au jus or horseradish.

Nutrition