Caramelized Onion Tart with Gorgonzola and Brie

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A little while ago, on a visit to Annisquam, Massachusetts, my friends Ann and Nick hosted an “Impress the Food Blogger” dinner at their home. Guests were encouraged to bring a favorite dish, and we all got to vote on what we thought would be a hit on the site.

The evening was a blast, the votes were tallied, and the winning dish? This caramelized onion tart, or pizza as it was called, brought by Ann’s friends Jeff and Marilyn.

I’ve made this tart several times since I first had it, and it’s one of those dishes you want to limit to special occasions, because it’s really hard to stop eating, it’s that good. Crispy, pillowy puff pastry, with balsamic caramelized onions, topped with sprinklings of gorgonzola, brie, and tarragon.

Caramelized Onion Tart

The original caramelized onion pizza recipe is from Marilyn and Jeff’s friend Bonnie Stern, Canadian author of several cookbooks. I played a bit with the recipe, rolling the dough out more thinly, reducing the amount of onions and cheese, so the serving pieces would be easier to hold and work better as appetizers. Perfect for New Year’s crowd. Enjoy and Happy New Year!

Caramelized Onion Tart with Gorgonzola and Brie Recipe

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  • Prep time: 10 minutes
  • Cook time: 50 minutes
  • Yield: Makes 9 to 12 appetizer sized pieces.

Tarragon is a summer herb, if you can't find any, you may crush a few fennel seeds (maybe half a teaspoon) and sprinkle over the tart. Or top with fresh chopped fennel fronds, after the tart has been taken out of the oven.

Ingredients

  • 2 Tbsp olive oil
  • 4 cups of sliced onions, sliced root-to-top into 1/4-inch thick slices (about 2-3 med onions)
  • 1 Tbsp brown sugar
  • 2 Tbsp balsamic vinegar
  • 1/2 tsp salt
  • 1/2 tsp pepper
  • 8 oz frozen puff pastry (defrosted a couple hours in the fridge)
  • 2 oz chilled Brie cheese, rind removed and diced
  • 2 oz Gorgonzola or other blue cheese, diced
  • 2 Tbsp chopped fresh tarragon

Method

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1 Heat oil in a large deep pan on medium-high heat. Add onions and cook for about 10 minutes or until wilted and starting to brown. Add sugar, vinegar, salt and pepper. Reduce heat and cook gently, uncovered for 20-25 minutes or until richly caramelized. Add a little water if the onions look like they are starting to dry out. Cool.

2 Roll pastry into a 10-to-14-inch rectangle (or whatever shape you want). Place pastry on a baking sheet lined with parchment paper. Prick with a fork at a couple inch increments to prevent the pastry from forming big bubbles while baking.

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3 Spread onions over pastry, all the way to the edges of the pastry. Dot with cheese. Sprinkle with tarragon. Refrigerate if not baking immediately.

4 Bake in a preheated oven at 400°F for 18-20 minutes or until cheese has melted and pastry is crispy. Cool for 5 minutes. Cut into wedges or squares and enjoy!

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Links:

How to Slice an Onion

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Showing 4 of 43 Comments

  • Laura

    I want to make this for a party we’re going to for Christmas. Wondering your thoughts on making this ahead – better to bake and then reward at the party or better to prepare and them bake it at the party?

  • Olivia

    I made this and everyone loved it, it was a hit. I will definitely be making this again. This website is amazing!

  • Denise

    Thanks for posting this recipe! I found it on Pinterest and I reviewed it right here: http://PinEatReview.com/2012/03/02/caramelized-onion-tart-with-gorgonzola-and-brie/. (Naturally I gave you credit and links throughout.) Thanks again! –Denise

    So glad you liked it! ~Elise

  • Mary

    I am not a Blue Cheese fan, but made it just as written except a tad more Brie. This was GREAT! Tx!!!

  • Corrie

    This recipe is fantastic! We used chicken thighs slow cooked in stock and herbes de provence and added chopped spinach to make it a gourmet pizza.

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