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Roast Beef Crostini with Dijon Horseradish Sauce

September 12, 2022 · Nicole Triebe

This Roast Beef Crostini is a simple appetizer anyone will love! Thin slices of roast beef, a tangy horseradish dijon sauce and capers all piled high on little toasts! Perfect for your next party!

Why We Love This Roast Beef Crostini

There is something undeniably delicious about crusty bread and pretty toppings, and it couldn’t be an easier thing to put together. This roast beef crostini recipe goes from your kitchen to serving platter in under 20 minutes, and it’s packed with so much flavor! So why not try this elegant holiday appetizer for your holiday gathering? They’re the ultimate finger food! This makes a perfect appetizer for the holidays or new year’s eve! 

Key Ingredients for this Recipe

ingredients for roast beef crostini in bowls on tiled surface

1/4 cup mayo

1/4 cup sour cream

1 tbl horseradish

4 tsp Dijon Mustard

Crusty Baguette

Extra virgin olive oil

1/2 pound deli Roast Beef, thinly sliced

Microgreens, chives or green onions

Capers

Freshly grated parmesan cheese

Step By Step Instructions To Make This Roast Beef Appetizer

  1. Heat oven to 350 degrees F. Using a cutting board and bread knife, slice baguette on an angle to make small toasts.
  2. Place baguette slices in a single layer on a baking sheet or cookie sheet; brush both sides with olive oil, and season with salt and pepper.
  3. Bake until golden, 15 to 20 minutes, rotating sheets halfway through (if undersides are not browning, turn crostini over once during baking).

To make the horseradish cream sauce, combine the following in a small bowl:

1/4 cup mayo

1/4 cup sour cream

1 tbl horseradish

4 tsp Dijon Mustard

Salt and black pepper to taste

Spread a tablespoon of the horseradish dijon onto toasted baguettes.

Fold a piece of roast beef on top.  You can get high quality roast beef from your deli counter at your local grocery store, or roast your own beef tenderloin at home.

Top with a small dollop of more creamy horseradish sauce, a few capers and some microgreens if you’d like (these are just for presentation). If you can’t find microgreens at your grocery store, chives or fresh parsley are a great topper as well and provide nice flavor!

Lastly, I added a few crumbles of freshly grated parmesan cheese and freshly ground pepper for another layer of flavor. I know you’ll love this delicious roast beef crostini!

Pair these roast beef crostini with a nice glass of wine.  A great Cabernet Sauvignon or Shiraz is a perfect match for beef, and completes this bite!

close up shot of roast beef crostini garnished with horseradish dijon sauce, capers and microgreens on a wood serving platter

Additional Recipes to Try

Tomato Brushetta with Homemade Pesto – classic tomato basil bruschetta is a seriously delicious appetizer bursting with fresh flavor!

Whipped Feta Dip with Sun Dried Tomato – This dip is a creamy savory spread, perfect for pairing with toasted pita wedges, or spreading on sandwiches!

Sweet Corn Arancini – Cheese stuffed Italian rice balls rolled in breadcrumbs and fried to golden brown perfection!

overhead shot of roast beef crostini garnished with horseradish dijon sauce, capers and microgreens on a wood serving platter, placed next to a glass of wine

Print
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Roast Beef Crostini with Dijon Horseradish Sauce

  • Author: Nicole Triebe
  • Prep Time: 5 minutes
  • Cook Time: 15 minutes
  • Total Time: 20 minutes
  • Yield: 610 1x
  • Category: Appetizer
  • Method: Bake
  • Cuisine: American

Description

Delicious and savory roast beef crostini with a creamy horseradish sauce! This simple crostini appetizer is perfect for holiday entertaining or your next dinner party! 


Ingredients

Scale

1/4 cup mayo

1/4 cup sour cream

1 tbl horseradish

4 tsp Dijon Mustard

Salt and pepper to taste

Crusty Baguette

1/2 pound Roast Beef, thinly sliced

Microgreens or chives

Capers

Freshly grated parmesan cheese


Instructions

  1. Preheat oven to 350 degrees. Arrange your baguette slices on two large rimmed baking sheets; brush both sides with oil, and season with salt and pepper.
  2. Bake until golden, 15 to 20 minutes, rotating sheets halfway through (if undersides are not browning, turn crostini over once during baking).
  3. Spread a tablespoon of the horseradish dijon onto a toast.

  4. Top with a slice of roast beef.  

  5. Top with a small dollop of more Dijon Horseradish sauce, a few capers and some microgreens if you’d like (these are just for presentation).  

  6. Add a few crumbles of freshly grated parmesan cheese for another layer of flavor (optional)

Keywords: roast beef; crostini; horseradish; toast

Want to pin this for later? Click on the image below!

Roast beef crostini pin

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10 Comments

  • Reply Vicky November 19, 2018 at 4:15 pm

    Maille mustard is the best and my go to always! And I myself just bought the Flavor Bible book too and need to start using it in my cooking : ))

    • Reply Nicole Triebe November 19, 2018 at 4:17 pm

      I’m obsessed with the flavor bible! Thanks for stopping by!

  • Reply Elaine Benoit November 19, 2018 at 4:20 pm

    I have to get this Maille dijon mustard! I’m always looking for fun and delicious new mustards as my hubby is hooked! Your roast beef crostini looks so fabulous! I love everything about it, especially the horseradish sauce.

  • Reply Julia November 19, 2018 at 4:53 pm

    Oh my Goodness! I wish this was on my table right now! I think I wouldn’t be sharing these crostini with anyone 🙂

  • Reply Lisa | Garlic & Zest November 19, 2018 at 4:58 pm

    These crostini would be absolutely perfect for a holiday cocktail party. I’ll just put some bubbly in the cooler — and call my friends up!

  • Reply Gabi November 19, 2018 at 7:04 pm

    I’m a huge fan of horseradish and also dijon mustard, and yet I’ve never combined the two of them into a cream. Time to check your amazing topping recipe. Thank you for inspiring me.

  • Reply Kathleen November 13, 2021 at 4:41 pm

    Today is the second time making this amazing appetizer. My guests raved about it last week so I’m making it again today. Thanks for a great recipe

  • Reply Caroline Shaddow December 20, 2021 at 12:30 am

    Made it last night; so good! Everyone enjoyed it@

  • Reply Jennifer February 7, 2022 at 12:13 am

    Absolutely delicious! I will definitely make these again for company. Thanks for sharing your recipes.

  • Reply Sofia Graf September 27, 2022 at 5:01 pm

    I have tried the recipe for Delicious and savory roast beef crostini recently but I have used organic ghee instead of using mayo. I likes the taste but is ghee is a better substitute to mayo? I am just wondering.
    https://milkio.co.nz/organic-ghee/

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