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Caramelized Onion Crostini

Caramelized Onion Crostini
I made this appetizer for a friend’s birthday party along with the Caprese Skewers. I found this recipe in my new favorite cookbook, Tyler’s Ultimate by Tyler Florence (thank you, Jason). I adapted the recipe a bit by reducing the butter and anchovy amounts and by slicing the baguette. The combination of caramelized onions, salty anchovies, and Asiago with the tangy olive was amazing! The colors of this appetizer may not be visually stunning but the flavors are. This crostini was a huge hit with everyone at the party and they disappeared quickly. I will be making this appetizer over and over again.

Caramelized Onion Crostini:


  • 2 tbsp butter
  • 1 tsp olive oil
  • 2 onions, sliced
  • 6 anchovy fillets, chopped
  • 1 tsp thyme
  • Sea salt and freshly cracked pepper, to taste
  • 1 baguette, sliced
  • 1/3 cup pitted kalamata olives, sliced in half
  • Asiago cheese, shaved

Caramelized Onion Crostini

How to Make Caramelized Onion Crostini

Preheat the oven to 400 degrees.

Heat the butter and olive oil in a large skillet over medium heat. Add the onions, anchovies, thyme, sea salt, and freshly cracked pepper, to taste. Cook, stirring occasionally until the onions are sweet and golden brown, about 20 minutes.

While the onions are cooking, slice the baguette, then coat each slice with a bit of olive oil cooking spray. Place in the oven and bake for 5-7 minutes or until golden brown.

Top each baguette slice with a bit of caramelized onions, some shaved Asiago, and an olive. Enjoy.

Caramelized Onion Crostini

Click here for a printable version of this recipe – For the Love of Cooking.net




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  1. I made some a little similar a few months back, but instead I used manchego cheese.

    Looks really good!! Definitely perfect for any party.

  2. Pam, your making my mouth water, I can imagine the amazing flavors of this appetizer! I'm so glad you are enjoying the cook book 🙂

  3. Love caramelized onions and don't seem them used very often. And with Asiago? And Bread? Yum. This looks fantastic. I keep reading about Tyler Florence's books – must check him out!

  4. Good lord, I need to stop reading food blogs first thing in the morning when I havent had breakfast yet. My stomach just growled. These look delicious.

  5. Cute little appetizers are so much fun! Sadly, I never have left over bread sufficient to let me try any of your ideas.

  6. NOW I KNOW what I am making for the Halloween cocktail party I just got invited to. FABulous, Pam!! LOVE how these both look and sound!

  7. They look terrific but not so sure about the onions. My children really like 'em but I'm still on the fence. 🙂

  8. mmm, hooray for caramelized onion ANYTHING! this is a great little appetizer–the decorative olive on top really completes the creation!

  9. Mmm, mmm, good! I love stuff like this, and with the holiday season around the corner, this is one that will please the crowds!

  10. I love all and any crostini.
    This is a nice combo, especially w/ my beloved anchovies.
    I have to buy Tyler's book, I do like him a lot!