Steak Crostini with Onion Confit and Horseradish Cream ~ Savory Simple ~ www.savorysimple.netSteak Crostini with Onion Confit and Horseradish Cream

March Madness has finally arrived! Have you picked your favorite team to win? This is an incredibly fun time of year for fans of college basketball. The excitement of spring, brackets, get togethers, friendly rivalries, and good food all make March a time for joyful celebrations. This is a perfect time to gather your friends and family together to enjoy some tasty nibbles while watching the tournament unfold.

Will you be hosting a party this year? If so, have you planned your menu yet? You can never go wrong with classic dishes like wings or nachos, but why not elevate things a bit? This steak crostini with onion confit and horseradish cream is an elegant party snack that will satisfy everyone!

Steak Crostini with Onion Confit and Horseradish Cream ~ Savory Simple ~

Steak Crostini with Onion Confit and Horseradish Cream
Prep time
Cook time
Total time
Serves: 30-40 crostini
  • ⅓ cup extra virgin olive oil
  • ⅓ cup red wine vinegar
  • ¼ cup soy sauce
  • 1 garlic clove, crushed
  • 1 pound flank steak
  • 8 ounces sour cream
  • 1 tablespoon dijon mustard
  • 2 tablespoons horseradish
  • ½ teaspoon salt
  • 1 baguette
  • 3 tablespoons extra virgin olive oil, divided
  • 2 large yellow onions, chopped
  • 3 serrano peppers
  • salt and pepper
  1. Prepare the marinade: combine the olive oil, red wine vinegar, soy sauce, and garlic. Trim and discard any fat from the steak and place it in a resealable plastic bag along with the marinade. Refrigerate for at least 4 hours or preferably overnight.
  2. Whisk together the sour cream, dijon mustard, horseradish and salt. Set aside.
  3. Preheat the oven to 350 degrees F. Thinly slice the baguette on a slight bias and brush with 1 tablespoon olive oil. Sprinkle with salt. Bake for 10-15 minutes, or until crunchy. Set aside.
  4. Heat 2 tablespoons olive oil in a large skillet on low heat. Add onions and a pinch of salt. Have a measuring cup full of water nearby. Cook the onions on low heat, stirring frequently, until the onions begin to brown. Turn up the heat to medium and continue caramelizing the onions. As a glaze develops on the bottom of the pan, add a few tablespoons of water and scrape up the brown bits, incorporating them into the onions. The heat will cause the water to evaporate. Repeat this process for approximately 25-30 minutes, keeping a close eye on the onions to make sure they don't burn. When the onions have turned a dark brown color and are both bitter and sweet in flavor, remove from the heat and set aside.
  5. Preheat the broiler and place a rack toward the top of the oven. Remove steak from the marinade and pat dry with paper towels. Season generously with salt and pepper then broil for 5-6 minutes per side. Allow the meat to rest for at least 10 minutes, then slice very thin against the grain. Allow some of the juices to drain on paper towels.
  6. Slice the serrano peppers thinly.
  7. Spread a thin layer of onion confit on each crostini. Top with a slice of flank steak followed by a dollop of horseradish cream. Place a thin slice of pepper on top. These can be made up to 2 hours before serving.

This post is part of BlogHer’s March Madness editorial series, made possible by Kettle Brand Chips.

More party recipes:

Savory Simple – Cheesy Baked Jalapeno Poppers
Savory Simple – Parmesan, Rosemary and Thyme Shortbread
Savory Simple – Sweet and Spicy Curried Popcorn
Domestic Fits – Maple Chipotle Wings
Mother Thyme – Avocado Deviled Eggs

  • Carrie

    OH my word this speaks to me. There is nothing better than steak and horseradish together. We don’t watch sports… but this is something I want to make just for me ;)

  • Jackie

    BEAUTIFUL! I love this as a perfect party appetizer, it’s perfect :)

  • Heather

    I’m really super bad at paying attention to sports. But!!!!! Red meat is always a winner in this house full of boy (probably because I have 9,265 veggie burger recipes…)and they will be ALL OVER THIS. Thank you!

    • Jennifer Farley

      This is the only sport I pay attention to all year long and only during the tournament. I like to gamble :D

  • Michelle

    Holy cow, does that looks delicious . . . and so elegant! What a perfect appetizer to wow your guests!

  • Anne

    This looks like it would be a winner amongst the men in my house!

    • Jennifer Farley

      Steak always wins!

  • Marie

    Absolutely love this for a more elegant party snack! The serrano pepper is a perfect finishing touch!

  • kristy

    I make this same version often but have never put a jalapeno slice on top! You’d think that with my jalapeno obsession this would have occurred to me!

    • Jennifer Farley

      A little spice makes everything better!

  • Kelly

    What a great idea, making a crostini with steak :) This looks delicious!

  • Tracey

    Mmmm, steak and onions – two of my very favorite foods in the world! This is a great idea, definitely a fun change from the norm.

  • Laura (Tutti Dolci)

    What a great use for steak! Love the onion confit.

  • Monet

    I have almost forgot about march madness! Too much on the brain right now! But I would love to host a few parties…and serve this delicious crostini. It looks too good! Thank you so much for sharing. I hope you have a blessed week full of good food, good friends, and much laughter.

  • fabiola

    That is a perfect bite of food. And I love horseradish, like on a maybe not so healthy level. Love.

  • Riley

    This looks so good, and almost too good to eat. Love the horseradish cream. This is such a great idea!

  • Jennifer

    Oh my goodness, these are incredible! My hubby would flip over these! I always love to serve appetizers like these when we have friends over. These would be a huge it! Thanks for sharing my Avocado Deviled Eggs too! :)

  • natalie

    What a great recipe! Thanks for sharing.

  • Gerry

    I’m all about elevating the snacks! I could eat finger food all day long and these crostini’s look really really good! I just noticed the avocado link…thanks ;)

  • Deborah

    I’m not hosting a party, but now I want to just to make these!!

  • MadSCAR

    Love it! Thanks for the recipe :)

  • Jennifer

    March Madeness! I can’t keep up with all of these sports, holidays and mini holidays, ahhhhh!!! :) However, I wouldn’t mind them so much if someone would make me a steak crostini.

  • Aggie

    everything is better on a crostini! Love this! :)

  • Chung-Ah | Damn Delicious

    Is it bad that I don’t even know the teams in the whole March madness thing? What I do know is that I would love to have some of this crostini for breakfast!

  • Alice @ Hip Foodie Mom

    I love anything on a crostini. . this looks delicious, yum!

  • Anna @ Crunchy Creamy Sweet

    I love crostini! This steak version looks amazing!

  • Terris | Free Eats

    This looks so good and I’m loving your photography! It makes me realize how a black background can really work.

  • Valerie

    I would pretend to enjoy watching basketball if it meant I could sneak into parties and eat this kind of food! ;) This crostini looks delicious!

  • Carol | a cup of mascarpone

    My mouth is seriously watering right now! I love making crostini and bruschetta of all types, and have never, ever thought of using steak. LOVE it!

  • Laura Dembowski

    Those look great! What an elevated game day snack!

  • Tamara Coleman

    These are making my mouth water!

  • Rachael {Simply Fresh Cooking}

    The jalapeno slice on top sealed the deal for me!

  • Jenny @ BAKE

    These crostini look incredible! and your photos are gorgeous!

  • BitsyBet

    Horseradish sounds good, but Bearnaise sauce would be another good option. Great idea for a delicious hors d’oeuvre.