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Roast Beef Sliders

Roast Beef Sliders
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These Roast Beef Sliders are juicy, tender, and packed with rich flavor, combining thinly sliced roast beef, melty cheese, caramelized onions, and fresh arugula inside soft slider buns. Perfect for parties, game days, or family gatherings, they feature easy preparation, customizable toppings, and crowd-pleasing taste.

Ingredients

Scale

Main Ingredients

  • Thinly sliced deli roast beef – about 1 pound
  • 12 soft slider buns
  • 12 slices provolone or Swiss cheese
  • 1 cup horseradish mayonnaise (see horseradish mayo below)
  • 1 cup caramelized onions (about 2 large onions)
  • 1 cup fresh arugula or lettuce

Horseradish Mayo

  • 1/2 cup mayonnaise
  • 2 tablespoons prepared horseradish paste
  • 1 teaspoon lemon juice
  • Salt and pepper to taste

For Caramelized Onions

  • 2 large onions, thinly sliced
  • 2 tablespoons butter or oil

Instructions

  1. Prepare the caramelized onions: Thinly slice onions and cook slowly over low heat in butter or oil for 20–30 minutes until soft and golden brown, bringing out their natural sweetness.
  2. Mix the horseradish mayo: Combine mayonnaise, horseradish paste, lemon juice, salt, and pepper in a bowl until smooth and tangy.
  3. Assemble the sliders: Slice slider buns in half, spread horseradish mayo generously on each half, then layer roast beef slices, caramelized onions, a slice of cheese, and fresh arugula or lettuce.
  4. Heat and melt the cheese: Place assembled sliders on a baking sheet and warm in a preheated oven at 350°F (175°C) for about 5 minutes, just until the cheese melts and beef is warmed without drying out.
  5. Serve and enjoy: Remove sliders from oven and serve warm alongside your favorite sides or garnishes.

Notes

  • Slice beef thinly for tenderness and easy folding inside buns.
  • Warm sliders briefly to avoid drying out beef and buns.
  • Make caramelized onions a day ahead for richer flavor and easier assembly.
  • Use soft, fresh slider buns for best texture and taste.
  • Offer a toppings bar so guests can customize their sliders.

Nutrition

Keywords: roast beef sliders, party sliders, easy appetizer, game day food, beef sandwich

Find it online: https://lillysplate.com/roast-beef-sliders/