Ingredients

  • 1/3 cup Horseradish Mayonnaise
  • 8 (3-inch) slider buns, sliced in half horizontally and toasted
  • Kosher salt
  • Freshly ground black pepper
  • 8 ounces thinly sliced roast beef
  • 1 cup caramelized onions
  • 10 cornichons, thinly sliced lengthwise
  • 2 cups watercress (about 2 ounces), washed and dried

Method

  • Divide the horseradish mayonnaise among the tops and bottoms of the buns (about 2 teaspoons per bun).
  • Season generously with salt and pepper.
  • Divide the roast beef among the 8 bottom buns.
  • Top each slider with caramelized onions, cornichons, and watercress and close with a top bun.