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Easy Steak Crostini with Horseradish Cream and Caramelized Onions

Close-up of a delicious steak crostini bite topped with rare steak, goat cheese, and balsamic caramelized onions.
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Make impressive party bites with this easy steak crostini recipe. It features tender steak, a zesty horseradish sauce, and sweet caramelized red onions on toasted baguette slices. This is a gourmet finger food perfect for entertaining.

Ingredients

Scale
  • 1 baguette, sliced on a diagonal into 1/2-inch pieces
  • 2 tablespoons olive oil
  • 1 pound sirloin or filet mignon steak
  • Salt and pepper to taste
  • 1 large red onion, thinly sliced
  • 1 tablespoon butter
  • 1 teaspoon sugar
  • 1/2 cup sour cream
  • 2 tablespoons prepared horseradish
  • 1 teaspoon Dijon mustard
  • 1 tablespoon fresh chives, chopped
  • 2 tablespoons balsamic glaze (for drizzling)

Instructions

  1. Preheat your oven to 375°F (190°C). Arrange the baguette slices on a baking sheet. Brush both sides lightly with olive oil. Bake for 8 to 10 minutes, flipping halfway, until the bread is golden brown and crisp. Set aside.
  2. Season the steak generously with salt and pepper. Heat a skillet over medium-high heat. Sear the steak for 3 to 4 minutes per side for medium-rare, adjusting time for your desired doneness. Remove the steak from the pan and let it rest on a cutting board for 10 minutes before thinly slicing against the grain.
  3. While the steak rests, prepare the onions. Melt the butter in the same skillet over medium heat. Add the sliced red onion and a pinch of salt. Cook slowly, stirring occasionally, for 15 to 20 minutes until the onions are soft and deeply browned. Stir in the sugar during the last 5 minutes of cooking. Remove from heat.
  4. Prepare the horseradish cream. In a small bowl, combine the sour cream, prepared horseradish, and Dijon mustard. Mix until smooth.
  5. Assemble the steak crostini. Spread a small amount of the horseradish cream onto each toasted baguette slice. Top with a few thin slices of steak. Place a small amount of caramelized red onion over the steak.
  6. Drizzle each crostini lightly with balsamic glaze and sprinkle with fresh chives before serving.

Notes

  • For a richer flavor, use a small amount of blue cheese or Brie spread thinly on the crostini before adding the steak.
  • If you do not want to caramelize onions, you can use store-bought onion jam for a quick alternative.
  • You can marinate the steak briefly (15 minutes) in olive oil, garlic powder, and Worcestershire sauce before searing for extra flavor.

Nutrition

Find it online: https://kitchenslang.com/steak-crostini-easy-appetizer-recipes/