Roast Beef Sandwich with Watercress and Horseradish Mayonnaise

  • Level: Easy
  • Yield: 4 servings, serving size 1 sandwich
  • Total: 30 min
  • Prep: 10 min
  • Inactive: 20 min
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Ingredients

1/4 cup nonfat Greek style yogurt or 1/3 cup regular, plain nonfat yogurt

2 tablespoons mayonnaise

1/4 cup prepared white horseradish, squeezed of excess juice (about 3 tablespoons)

1/4 teaspoon salt

1/8 teaspoon pepper

1 bunch watercress, thick stems removed

8 slices whole-grain pumpernickel bread

12 ounces lean roast beef, thinly sliced

2 medium tomatoes sliced

1/2 small red onion, thinly sliced

Directions

  1. If using regular yogurt, place it in a strainer lined with paper towel and set the strainer over a bowl. Let the yogurt drain and thicken for 20 minutes.
  2. Combine thickened or Greek-style yogurt, mayonnaise, horseradish and salt and pepper in a small bowl and stir to incorporate.
  3. Place 1/4 cup watercress each on 4 slices of bread and drizzle with 2 tablespoons horseradish mayonnaise. Layer with 3 ounces roast beef per sandwich, tomato slices and onion slices. Top with another slice of bread and wrap in waxed paper, then aluminum foil.

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Mattarpaneer

This was incredibly flavorful and mouthwatering. I was worried that the horseradish would be overwhelming, but it wasn't overly sharp, just delicious. I found that I preferred using only 1-2 slices of roast beef because otherwise the sandwich was a little too moist, but that may have been because the only pumpernickel loaf I could find was quite small and thinly sliced. In spite of this minor setback, this sandwich made an amazing packed lunch, and my only real gripe is that all those onions and horseradish made my breath a little bit foul.

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