Roast Beef Sandwich with Horseradish Mayo Radishes

This roast beef sandwich, made with either leftover roast beef or beef from the deli, is delicious. We top ours with thinly sliced radishes mixed with horseradish and mayo, which gives it the perfect crunch and flavor. You’ll love it!

This roast beef sandwich is one of those recipes that’s simple, satisfying, and way more delicious than it has any right to be. I make it with either leftover roast beef or deli beef, then pile it high with a crunchy radish salad tossed in creamy horseradish mayo and dotted with salty capers. The radishes add just the right bite, and the horseradish brings everything together with a little kick.

Whether you’re looking for a smart way to use up leftovers or want a seriously good sandwich, this one delivers. It’s easy to make, full of flavor, and proof that lunch (or dinner… or breakfast—I’m not judging) doesn’t need to be complicated to be really, really good.

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Roast Beef Sandwich with Horseradish Mayo Radishes

Prep: 5 minutes mins

Cook: 0 minutes mins

Total: 5 minutes mins

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This roast beef sandwich, made with either leftover roast beef or beef from the deli, is delicious. We top ours with thinly sliced radishes mixed with horseradish and mayo, which gives it the perfect crunch and flavor. You'll love it!

4

Ingredients

• ▢ 1 cup sliced radishes
• ▢ 2 tablespoons mayonnaise (plus extra for the bun, optional)
• ▢ 1 tablespoon prepared horseradish
• ▢ 2 teaspoons capers
• ▢ 4 soft buns (brioche or kaiser buns work well)
• ▢ Arugula or romaine lettuce (for the buns)
• ▢ 8 ounces sliced roast beef

Instructions 

• In a small bowl, combine the radishes, mayonnaise, horseradish, and capers.
  1 cup sliced radishes, 2 tablespoons mayonnaise, 1 tablespoon prepared horseradish, 2 teaspoons capers
• Spread mayonnaise on both sides of each bun and top with lettuce, roast beef, and the radishes.
  4 soft buns, Arugula or romaine lettuce, 8 ounces sliced roast beef

Nutrition

Serving: 1 sandwich, Calories: 461kcal (23%), Carbohydrates: 41g (14%), Protein: 22g (44%), Fat: 24g (37%), Saturated Fat: 12g (75%), Polyunsaturated Fat: 2g, Monounsaturated Fat: 1g, Trans Fat: 1g, Cholesterol: 178mg (59%), Sodium: 1371mg (60%), Potassium: 248mg (7%), Fiber: 1g (4%), Sugar: 1g (1%), Vitamin A: 790IU (16%), Vitamin C: 31mg (38%), Calcium: 221mg (22%), Iron: 2mg (11%)

© Author Kristen Stevens

We have thoroughly tested this recipe for accuracy. However, individual results may vary. See our full recipe disclosure here.

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