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Steak Crostini with Horseradish Sauce & Caramelized Onions – Elegant & Flavor-Packed

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Savory steak crostini topped with creamy horseradish sauce and caramelized onions — perfect for elegant appetizers, cocktail parties, or special occasions.

Ingredients

Scale

  • 1 baguette, sliced into ½-inch rounds

  • Olive oil, for brushing

  • ½–¾ lb ribeye or sirloin steak

  • Salt and pepper

  • 2 large yellow onions, sliced

  • 2 tbsp butter or olive oil

  • 1 tsp balsamic vinegar (optional)

Horseradish Sauce:

  • ½ cup sour cream or crème fraîche

  • 1½ tbsp prepared horseradish

  • 1 tsp Dijon mustard

  • 1 tsp lemon juice

  • Salt and pepper

Garnish:

  • Fresh chives, parsley, or microgreens

Instructions

  1. Caramelize onions in butter over medium-low heat for 30–40 minutes. Add vinegar near the end.

  2. Whisk horseradish sauce ingredients in a bowl; chill until ready.

  3. Brush baguette slices with olive oil and toast at 375°F for 8–10 minutes until crisp.

  4. Sear steak in a hot skillet 2–3 minutes per side. Rest, then slice thinly.

  5. Assemble crostini: spread sauce, layer onions, top with steak, and garnish.

  6. Serve immediately.

Notes

  • Prepare onions and sauce ahead of time.

  • Customize with cheese or balsamic glaze.

  • Serve warm or room temperature.

Find it online: https://nosweatrecipes.com/steak-crostini-with-horseradish-sauce-caramelized-onions-elegant-flavor-packed/