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Grilled Beef Tenderloin Crostini with Béarnaise Sauce

An impressive appetizer with juicy grilled beef on crisp crostini topped with a rich béarnaise sauce, perfect for any gathering.
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Prep Time 15 minutes
Cook Time 20 minutes
Total Time 35 minutes
Servings: 8 servings
Course: Appetizer, Snack
Cuisine: American, French
Calories: 250
Ingredients Method Notes

Ingredients
  

For the Crostini
  • 1 French baguette 1 French baguette, sliced into 1/2-inch rounds
  • 2-3 tablespoons olive oil
  • to taste Salt and pepper
For the Beef
  • 1 lb beef tenderloin, trimmed
  • to taste Salt and pepper
  • 1-2 tablespoons olive oil for grilling
For the Béarnaise Sauce
  • 1/4 cup white wine vinegar
  • 1/4 cup dry white wine
  • 2 tablespoons shallots, finely chopped
  • 1/2 teaspoon dried tarragon (or fresh if available)
  • 3 large egg yolks
  • 1/2 cup unsalted butter, melted
  • to taste Salt and pepper
  • to garnish Fresh tarragon optional but fancy

Method
 

Preparation
  1. Preheat your oven to 400°F (200°C).
  2. Toss baguette slices in a mixing bowl with olive oil, salt, and pepper.
  3. Arrange them on a baking sheet and toast in the oven for about 8-10 minutes or until golden brown and crisp.
Grilling the Beef
  1. While the crostini is toasting, season the beef tenderloin with salt and pepper.
  2. Heat a grill pan or outdoor grill to medium-high heat and add olive oil.
  3. Grill the beef for about 5-7 minutes per side for medium-rare (internal temperature around 130°F/54°C). Adjust time for your desired doneness.
  4. Let the beef rest for a few minutes before slicing it thinly.
Making the Béarnaise Sauce
  1. In a small saucepan, combine white wine vinegar, white wine, shallots, and tarragon. Simmer until reduced by half.
  2. In a bowl, whisk the egg yolks until frothy. Gradually whisk in the melted butter and then slowly add the reduction until it’s all mixed.
  3. Season the sauce with salt and pepper to taste.
Assembly
  1. Top each crispy baguette slice with a slice of the grilled beef.
  2. Drizzle your homemade béarnaise sauce generously over the beef.
  3. If you’re feeling fancy, garnish with fresh tarragon!

Notes

Don’t have a grill? A grill pan or even broiling the beef in the oven will work just fine. If the béarnaise sauce separates, just whisk it back together. Prep the sauce ahead to save time; just warm it up before serving.