Go Back

Roast Beef Sliders with Caramelized Onions

Ingredients
  

  • 12 small rolls (I prefer the Hawaiian sweet rolls)
  • 1/4 cup mayonnaise
  • 1/4 Dijon mustard
  • 2-3 tbsp tablespoons grated horseradish (depending on how hot you like it)
  • 1 lb sliced deli roast beef, sliced thin (I like to get the one that looks most rare or use leftover beef from a roast or tenderloin)
  • 6 slices cheese of your choice (I love cheddar or provolone; I’ve also used shredded gruyere)
  • 1/2 stick melted butter
  • 1 tbsp Dijon mustard
  • 1 tbsp sugar
  • 1 tbsp Worcestershire
  • 2 tbsp Everything Bagel seasoning (found in a bottle in the spice aisle)

For Caramelized Onions

  • 2 large onions, thinly sliced (I love to use a sweet onion on these)
  • 2 tbsp butter
  • 2 tbsp olive oil
  • pinch of salt

Instructions
 

Caramelized onions

  • Put fats in a large skillet and melt together.
  • Add onion slices and sprinkle with salt. Cook slowly over medium heat, stirring regularly. This will allow them to cook and get soft and brown. It will take about 20 mins. You can go longer depending on how brown and soft you want them to go.

Roast beef sliders

  • Slice rolls in half and place bottoms on a baking sheet.
  • Mix together mayonnaise, ¼ cup Dijon and horseradish. Spread evenly over the cut side of the buns.
  • Top with the beef, cheese and caramelized onions. Put top back on buns.
  • Melt butter, the tablespoon of remaining Dijon, sugar and Worcestershire in a small saucepan or microwave. Spoon over the sandwiches, then sprinkle Everything Bagel seasoning on top.
  • Cover loosely with foil and put in oven at 350 for about 15 minutes. Remove foil and bake for another 10 minutes until brown and cheese has melted.