Wow, so hard to believe that it is the last week of 2018. This year has seriously flown by and it has been a great year… my husband and I both started new jobs, we traveled A LOT (Ireland being our easy favorite), we adopted a puppy named Avery, and we loved watching our FIRST baby nephew grow and learn.
Alright enough about me! Let’s talk food.
Looking for something to do with all that leftover beef tenderloin or roast beef from the holidays?? Look no further…. These Beef Crostini with Caramelized Onions and Horseradish Aioli are super tasty and oh-so-easy to put together. I don’t know about you, but I am really embracing the post-holiday laziness. I cheated a bit and decided to buy my horseradish aioli versus making it myself. Traders Joe’s has a delicious horseradish aioli but if you don’t have a Trader Joe’s near by, I’ve seen a version at Kroger by Stonewall Kitchen. Either will work!
Beef Crostini with Caramelized Onions and Horseradish Aioli
Ingredients
- 1 french baguette 12 + inches long
- 2 yellow onions thinly sliced
- 8 oz sliced swiss cheese
- 1 lb Roast beef or Beef tenderloin thinly sliced
- 4 oz horseradish aioli*
- 4 tbp olive oil (split)
- salt and pepper to taste
- basil - for garnish (optional)
Instructions
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Heat 2 tablespoons of olive oil in a sauté pan over medium-low heat. Add the sliced onions and cook low and slow for 30-40 minutes until the onions have a nice caramelized color. Stir the onions every 5 minutes but refrain from touching them too often. Turn your stove down if the onions begin to get crispy or too dark.
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While the onions are caramelizing, you can begin preparing your crostini. Preheat your oven to 400 F. Slice the baguette into twenty-four 1/2 inch wide slices. Lay the slices flat on oiled cookie sheet. Brush the top of each crostini with olive oil and sprinkle with salt and pepper. Bake for 5 minutes.
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Remove the crostini's from the oven. Slice the Swiss cheese into pieces that just cover each crostini. Top each crostini with the sliced Swiss cheese & sliced beef. Put the crostini's back in the oven for another 5 minutes or until the cheese has melted.
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Top each crostini with a pinch of caramelized onions. Drizzle with the horseradish aioli. Sprinkle with julienned basil. Serve immediately
Recipe Notes
*I found Horseradish Aioli at Trader Joe's but it may be seasonal. Stonewall Kitchen makes a horseradish aioli too. If you can't find a pre-made horseradish aioli, feel free to make your own.
Need more Crostini inspiration? Try another one of my favorite crostini recipes: Peach and Honey Whipped Ricotta Crostini
Wow, I love the look and sound of these appetizers. After all the holiday meals, all I want for dinner is THIS!! Pour me a glass of wine and I an done!!
I’m loving everything about this post -your cute fur baby, your adorable real baby (happy birthday Harrison!) and these delicious crostinis! These will make the perfect New Year’s Eve appetizer! I don’t have any leftover beef from the holidays, but I’m sure a high-quality deli roast beef will be just as wonderful! Thanks of the inspiration! 🙂
Yum! Such a clever way of using leftover beef. I also think the horseradish aioli sounds like a good combination with the beef and caramelized onions. Great job!
I must have that horseradish aioli! It sounds incredible. What a wonderful treat for a holiday party too 🙂
These are such yummy crostini and a great way to use up leftover beef! Love the sound of horseradish aioli! Need to find some!
It looks like I found my New Year’s recipe! This looks amazing and the sauce sounds incredible!
This was easily my favorite recipe intro ever! There is so much you have done in 2018 that it was an absolute pleasure to read about it! Oh, and the recipe is awesome, too! 🙂
What cute pictures! Dogs + babies = 😀❤️
And these crostini sound amazing. I’m a sucker for that horseradish bite, so this sounds like it’s right up my alley.
These beef crostini with caramelized onions and horseradish look like the most perfect way to use leftover beef tenderloin! I’m adding these to our list next time we make beef tenderloin!
We loved these! Made them for Super Bowl. Go Chiefs!!
These were fantastic, I made an aioli of Mayo, horseradish with about a tablespoon of spicy brown mustard.
Just delicious!
Is there aany way to make this ahead of time ?