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Steak Crostini

A delightful appetizer that combines tender steak with creamy horseradish sauce and sweet caramelized onions, perfect for gatherings and celebrations.
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Prep Time 30 minutes
Cook Time 45 minutes
Total Time 1 hour 15 minutes
Servings: 8 pieces
Course: Appetizer, Snack
Cuisine: American, Comfort Food
Calories: 250
Ingredients Method Notes

Ingredients
  

For the Steak
  • 1 pound filet mignon or tenderloin Tender cuts are recommended for best flavor.
  • to taste Salt and black pepper For seasoning.
  • 2 tablespoons unsalted butter For caramelizing shallots.
  • 1 teaspoon garlic powder
  • 1 teaspoon dried thyme
For the Baguette
  • 1 loaf Baguette (thinly sliced) For the crostini base.
  • to taste Olive oil For brushing.
For the Creamy Horseradish Sauce
  • 1/2 cup mayonnaise
  • 2 tablespoons horseradish Adjust amount for desired spiciness.
  • 1 tablespoon Dijon mustard
  • 1 tablespoon lemon juice
  • to taste Salt and black pepper For seasoning.
For the Caramelized Onions
  • 2 large shallots (thinly sliced)
  • 1 tablespoon balsamic vinegar
  • 1 tablespoon brown sugar
  • to taste Salt and black pepper For seasoning.

Method
 

Preparation
  1. Season the steak with salt, black pepper, garlic powder, and dried thyme. Allow it to sit for at least 30 minutes.
Make Horseradish Sauce
  1. Mix together mayonnaise, horseradish, Dijon mustard, and lemon juice in a small bowl. Add salt and black pepper to taste, then refrigerate.
Caramelize Shallots
  1. Melt butter in a skillet over medium heat. Add sliced shallots and cook until softened. Stir occasionally.
  2. Add balsamic vinegar, brown sugar, salt, and black pepper. Continue cooking until caramelized and golden brown, about 30 minutes.
Cook Steak
  1. Heat olive oil in another skillet over medium-high heat. Cook seasoned steak according to desired doneness, about 4 minutes on each side for medium-rare.
  2. Let steak rest for a few minutes before slicing thinly.
Prepare Baguette
  1. Preheat oven to 375°F (190°C). Brush baguette slices with olive oil and toast in the oven for 5-7 minutes until golden brown.
Assemble Crostini
  1. Spread a layer of creamy horseradish sauce on a toasted baguette slice, top with a slice of steak, and add a spoonful of caramelized shallots.
Serve
  1. Arrange crostini on a serving platter, garnish as desired, and serve immediately.

Notes

Store leftover components separately in the refrigerator for up to two days. Reassemble before serving.