Caramelized Onion & Tomato Tart

Make this caramelized onion and tomato tart for breakfast, lunch or dinner! With just a few purchased ingredients, it can be on the table in about an hour! Add a side salad to this and it is the perfect meal! 


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basil and tomatoes on a carmalized onion and tomato tart

Caramelized Onion & Tomato Tart

  • Author: theperksofbeingus
  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Total Time: 45 minutes
  • Yield: 4 Servings 1x
  • Category: brunch
  • Cuisine: French


  • 1 sheet frozen puff pastry thawed overnight in refrigerator
  • 1 large red onion
  • 1 tablespoon garlic olive oil
  • 1/4 cup freshly shredded gruyere cheese
  • 1 pint cherry tomatoes
  • 1/4 cup freshly shredded parmesan cheese
  • 8 grinds fresh ground pepper
  • 1/2 tsp dried Italian herbs


Prepare Onions and Tomatoes.

  1. Slice red onion. Heat 1 tablespoon olive oil in skillet. Sauté onions on medium heat, stirring occasionally, till medium brown. Cover and allow to steam on low heat. This will take about 10-15 minutes. 
  2. Slice cherry tomatoes in half, and sprinkle lightly with salt. Allow to sit while preparing pastry.

Prepare Puff Pastry:


  1. Pre heat oven to 400 F.
  2. Put a piece of parchment paper on sheet pan. Place puff pastry in center. Use sharp knife to score (do not cut all the way through) about one inch around outside
  3. Use a fork, and generously poke holes all over the center section.

  1. Bake for 10 minutes, turning pan half way through.
  2. Pull pastry out of oven, and take the flat part of a fork and smash middle that has puffed up down.

Put Tart together:

  1. Brush center of pastry with garlic oil. Spread shredded gruyer cheese in center. Sprinkle with herbs. 
  2. Place onions over top of cheese. Sprinkle 1/2 of the freshly shredded parmesan over onions.
  3. Top with cherry tomatoes, cut side up. Add a few grinds of fresh pepper, and top with remaining parmesan cheese.
  4. Bake for a total of 30 minutes, turning half way through. If side crust is getting brown, and tomatoes have not quite cooked, cover lightly with foil.
  5. When tart is done, allow to rest for at least 5 minutes.Use parchment to pick up tart, and move to a cutting, and serving board, and slide out the parchment. Use a sharp knife to cut into 4 squares.



The type of cheese you should use should be a hard, tangy, flavorful cheese. We have used many varieties of sharp cheese combos, and they all turn out so good. Recently we used a whiskey white cheddar along with a drunken goat cheese. Winner combo for sure! 

Keywords: Puff pastry, caramelized onion tomato tart, brunch, breakfast, easy recipes, clean eating

Give this easy tomato and goat cheese tart a try!

Hi, we are Bruce and Dina Miller. We love to cook every night. We enjoy making a few healthy dishes, and also comfort food. We love crafting cocktails too! Come take a look, we would love to share our recipes with you.


  1. Katie Reply

    Oven temp!?

    • theperksofbeingus Reply


      Thank you for pointing out that I left that out! 400 F Thank you so much!

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