Ingredients

  • 1 cup crumbled Stilton cheese
  • 2 tablespoons mayonnaise
  • 1 tablespoon prepared horseradish
  • 8 (3 by 5-inch) sourdough bread slices
  • 1 pound thinly sliced roast beef
  • 1/2 red onion, thinly sliced
  • 1 bunch arugula, stems trimmed
  • Salt and pepper, to taste
  • 2 tablespoons (1/4 stick) butter

Method

  • Mash first 3 ingredients in a small bowl until almost smooth.
  • Place bread on work surface and surface and spread mixture on 1 side of each slice.
  • Top each of 4 bread slices with 1/4 of beef, then onion and arugula.
  • Season with salt and pepper.
  • Top with remaining bread, cheese side down.
  • Melt butter in heavy large skillet over medium-high heat.
  • Add sandwiches and cook until golden, about 2 minutes per side.
  • Serve hot.