Roast Beef Crostini with Horseradish Cream is an easy to make appetizer that feel a little bit fancy. Thin slices of deli roast beef top toasty crostini along with a tangy horseradish cream, arugula, a sprinkle of Gruyere cheese and diced tomatoes. They are perfect for your next party and are SO GOOD!

Roast Beef Crostini are a favorite appetizer recipe! I recently made them for a holiday cocktail party as a group of neighborhood friends gathered to kickoff the Christmas season. My big tray of these 2 bite roast beef appetizers were a hit! They were gobbled up in no time at all.
Crispy yet soft crostini is topped with a tangy horseradish cream, peppery arugula, thin slices of roast beef, nutty Gruyere cheese and bright red tomato. The combination of flavors is DELICIOUS!
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the ingredients for roast beef crostini
- a long baguette or skinny loaf of bread
- extra virgin olive oil
- kosher salt
- sour cream
- mayonnaise
- prepared horseradish ~ Available at the grocery store and usually in the condiment aisle. It's a jar of grated horseradish, vinegar and salt.
- arugula ~ A leafy green with a peppery taste.
- deli roast beef
- shredded Gruyere cheese
- diced tomato
How to make crostini
I struck upon the perfect crostini recipe while sipping wine and nibbling on appetizers at my friend Linda's home. She has the perfect crostini as it's slightly crisp and just a little soft. It is ideal accompaniment to my basil hummus, pimento cheese, creamy New England Clam chowder, and these roast beef crostini.

Here's the crostini details:
- Cut a long thin loaf of bread into ½ inch slices.
- Brush with extra virgin olive oil and sprinkle with kosher salt.
- In a hot cast iron skillet (a large sauté pan will work too), quickly toast each side of the bread slices. Flip the bread after a minute or so for the perfect crostini.
- Serve warm or at room temperature.
How to make roast beef crostini
- Toast the bread ~ In a hot pan, quickly toast slices of a long thin loaf that are brushed with extra virgin olive oil and sprinkled with kosher salt.
- Mix the horseradish cream ~ In a small bowl, combine the sour cream, mayonnaise, and prepared horseradish.
- Assemble the roast beef crostini ~ For each beef appetizer, spread some of the horseradish cream on a crostini. Top with a couple arugula leaves, about a half slice of deli roast beef, another dab of the horseradish cream, some shredded Gruyere cheese and diced tomato.




Expert tips
- Use a thin loaf of bread for the crostini ~ for the perfect 2 bite appetizer, choose a loaf of bread that is about 2 to 3 inches in diameter.
- Ask the deli counter to thinly slice the roast beef ~ My first choice for the roast beef is medium rare Boar's Head which is available at most deli counters.
- Substitute your favorite semi hard cheese ~ some tasty choices are pepper jack, Swiss, Gouda and sharp cheddar.
- Make roast beef crostini in advance ~ There's no need for last minute prep for these easy yet fancy appetizers. Make them up to 2 hours in advance. Store in the refrigerator covered lightly with plastic wrap.

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Thanks ~ Amy
Recipe

Roast Beef Crostini with Horseradish Cream
Ingredients
- a long baguette, sliced ½ inch thick, about 20 slices
- extra virgin olive oil
- kosher salt
- ¼ cup sour cream
- 1 tablespoon mayonnaise
- 1 tablespoon prepared horseradish
- 1 cup arugula
- ½ pound deli roast beef, thinly sliced
- ½ cup finely shredded Gruyere cheese
- 1 small tomato, diced
Instructions
- Place the bread slices on a work surface. Lightly brush both sides with extra virgin olive oil and sprinkle with kosher salt.a long baguette, sliced ½ inch thick, about 20 slices, extra virgin olive oil, kosher salt
- Heat a cast iron skillet or large sauté pan over medium high heat. Add the bread slices and toast until lightly golden brown on each side ~ about 1 minute per side. Remove to a large plate.
- In a small bowl, combine the sour cream, mayonnaise, and horseradish.¼ cup sour cream, 1 tablespoon mayonnaise, 1 tablespoon prepared horseradish
- To assemble each appetizer, spread about 1 to 2 teaspoons of the horseradish cream on a crostini. Top with a couple leaves of arugula, about ½ slice of roast beef, a dab of horseradish cream, a sprinkle of Gruyere cheese and a couple pieces of diced tomato.1 cup arugula, ½ pound deli roast beef, thinly sliced, ½ cup finely shredded Gruyere cheese, 1 small tomato, diced
- Place the roast beef crostini on a large platter and serve.
Video
Notes
- Use a thin loaf of bread for the crostini ~ for the perfect 2 bite appetizer, choose a loaf of bread that is about 2 to 3 inches in diameter.
- Ask the deli counter to thinly slice the roast beef ~ My first choice for the roast beef is medium rare Boars Head which is available at most deli counters.
- Substitute your favorite semi hard cheese ~ some tasty choices are pepper jack, Swiss, Gouda and sharp cheddar.
- Make roast beef crostini in advance ~ There's no need for last minute prep for these easy yet fancy appetizers. Make them up to 2 hours in advance. Store in the refrigerator covered lightly with plastic wrap.
Nutrition








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