Roast Beef Sandwiches with Sweet-and-Sour Red Onions and Blue Cheese Recipe

Roast Beef Sandwiches with Sweet-and-Sour Red Onions and Blue Cheese Recipe

  • 2 cups thinly sliced red onions
  • 2 tablespoons red wine vinegar
  • 1 teaspoon sugar
  • 4 large soft whole grain rolls, toasted
  • 1/2 cup crumbled blue cheese
  • 12 tomato slices
  • 8 ounces thinly sliced roast beef
  • 2 cups (packed) small watercress sprigs
  1. Combine onions, vinegar, and sugar in medium bowl; sprinkle with salt and pepper. Let stand until onions are soft, tossing occasionally, at least 1 hour and up to 4 hours.
  2. Place bottom halves of rolls on work surface. Sprinkle with cheese. Top each with 3 tomato slices, then 1/4 of roast beef. Top each with 1/2 cup watercress, then 1/4 of pickled onions. Cover with tops of rolls. Cut each sandwich in half.
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