French Dip Sliders

Roast beef slider with cheese, onion and mushrooms.

5 from 3 votes

These buttery topped French Dip Sliders are a simple, delicious appetizer with caramelized onions and mushrooms, melted cheese and a flavorful au jus for dipping. Great for any party or gathering and will certainly steal the show!

Prep Time15

Cook Time20

Total Time45

Course: Appetizer

Cuisine: American

Servings: sandwiches

Author: Lorie Yarro

Ingredients

Sliders:

12 Hawaiian rolls
3/4 lb deli roast beef, thin sliced
6-8 slices provolone cheese
2 T butter melted
½ tsp thyme (dried)
coarse sea salt optional

For the Onions and Mushrooms:

1 yellow onion
8 oz mushrooms sliced
2 T butter
1/4 tsp salt
1 tsp sugar optional

Au Jus:

1 T butter
1 1/4 c beef broth
1 T Worcestershire
1-2 garlic cloves, minced
1/2 tsp thyme
sea salt to taste

Instructions

Caramelize the Onions and Mushrooms:

Melt 2 tablespoons of butter at medium high in a skillet. Add the onions and mushrooms and sauté for 3-4 minutes until the onions soften and start to become translucent. Sprinkle the sugar, salt and thyme over top and continue to heat, stirring every couple minutes until the onions become a caramel color. Remove from heat.

Assemble the Sliders:

Preheat the oven to 350°F.
Slice the rolls in half, keeping them attached to each other while doing so. Add the bottom of the rolls to a 9x13 inch baking dish. Layer the roast beef, then the provolone, top with the onions and mushrooms. Add the top layer of the Hawaiian rolls. Brush with the 2 tablespoons melted butter, covering the tops completely.
Loosely cover with foil and bake for about 15 minutes, or until the cheese is melted. Remove the foil and bake another 5-7 minutes or until the tops of the rolls are toasted and golden brown.

Prepare the Au Jus:

While the sliders bake, add the remaining tablespoon of butter to the skillet used for the onions and mushrooms. Melt over medium heat. Add all the other au jus ingredients and whisk to combine. Simmer on medium for about 10 minutes, allowing to slightly reduce. Transfer to a bowl to serve.

Serving Instructions:

When the sliders are ready, allow to cool for about 5 minutes before slicing. Slice to separate into sandwiches for easier serving. Sprinkle with chopped parsley if desired and enjoy with the au jus.

Notes

To keep the buns from getting too soggy: add the cheese first and last so that it is the only layer that touches the bread. Also, if you decide to use a roast beef that has been cooked in juices versus deli roast beef, make sure to drain as much of the juices off before adding to the rolls.
Reheating Instructions: you can bake these within 3 days of cooking. Bake at 350°F in a foil covered dish for about 8-10 minutes. You can also microwave them if desired for bout 45 seconds--this will vary based on your microwave so keep an eye on them.

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