Classy Steak Crostini for Holiday Entertaining
Steak Crostini with Horseradish Sauce & Caramelized Onions combines tender slices of seared steak, creamy horseradish sauce, and sweet caramelized onions on crisp toasted baguette rounds.
- Prep Time: 20 minutes
- Cook Time: 25 minutes
- Total Time: 35 minutes
- Yield: 8 to 10 servings 1x
Ingredients
1 baguette, sliced into 1/2-inch rounds
1 pound sirloin or strip steak
2 tablespoons olive oil, divided
2 large yellow onions, thinly sliced
Salt and black pepper to taste
1/2 cup sour cream
2 tablespoons prepared horseradish
1 teaspoon Dijon mustard
1 teaspoon fresh lemon juice
1 tablespoon chopped fresh parsley or thyme
Instructions
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Cook sliced onions in 1 tablespoon olive oil over medium-low heat for 25 to 35 minutes until deeply caramelized.
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Mix sour cream, horseradish, Dijon, lemon juice, salt, and pepper to make the sauce. Chill until ready to use.
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Brush baguette slices with remaining olive oil and toast at 400°F for 8 to 10 minutes until golden.
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Season steak with salt and pepper. Sear in a hot skillet for 3 to 4 minutes per side for medium-rare.
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Rest steak for 5 to 10 minutes, then slice thinly against the grain.
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Spread horseradish sauce on each crostini, top with caramelized onions and sliced steak.
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Garnish with fresh herbs and serve immediately.
Notes
Slice steak thinly for tender bites.
Assemble just before serving to maintain crisp bread.
Greek yogurt may replace sour cream if desired.