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Easy Steak Crostini with Creamy Horseradish Sauce

Three pieces of steak crostini topped with creamy sauce, medium-rare steak, and caramelized onions, ready to serve.
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Make this impressive steak crostini appetizer featuring tender steak, a zesty horseradish cream, and sweet caramelized onions on crispy baguette slices. This is a perfect, easy party bite for entertaining.

Ingredients

Scale
  • 1 pound sirloin or flank steak
  • 1 tablespoon olive oil
  • Salt and black pepper to taste
  • 1 baguette, sliced into 1/2-inch rounds
  • 1 tablespoon butter, softened
  • 8 ounces cream cheese, softened
  • 1/4 cup prepared horseradish, drained
  • 1 tablespoon fresh chives, chopped
  • 1 large yellow onion, thinly sliced
  • 1 tablespoon brown sugar
  • 1 tablespoon balsamic vinegar

Instructions

  1. Prepare the steak: Rub the steak with olive oil, salt, and pepper. Grill or pan-sear the steak to your preferred doneness, about 3-5 minutes per side for medium-rare. Let the steak rest for 10 minutes before thinly slicing against the grain.
  2. Make the caramelized onions: Melt butter in a skillet over medium-low heat. Add the sliced onion and cook slowly, stirring occasionally, for 20-25 minutes until deeply browned and soft. Stir in the brown sugar during the last 5 minutes of cooking. Remove from heat and stir in the balsamic vinegar.
  3. Prepare the horseradish cream: In a small bowl, combine the softened cream cheese, drained horseradish, and chopped chives. Mix until smooth and well combined.
  4. Toast the crostini: Brush the baguette slices lightly with olive oil or melted butter. Bake at 375°F (190°C) for 8-10 minutes, or until lightly golden and crisp.
  5. Assemble the appetizers: Spread a layer of the creamy horseradish sauce onto each toasted crostini slice. Top with a few slices of the cooked steak. Finish each bite with a small spoonful of the caramelized onions. Serve immediately for the best texture.

Notes

  • For a richer flavor, use filet mignon or tri-tip steak instead of sirloin.
  • If you prefer a sweeter topping, substitute the caramelized onions with a thick balsamic glaze drizzle over the finished crostini.
  • You can prepare the steak and the horseradish cream up to one day ahead to save time when entertaining.

Nutrition

Find it online: https://cookincorner.com/steak-crostini-recipe-easy-party-bites/