Tomato Onion Gruyere Tart

When I think about the rich flavors of Italy and France, there’s one dish that instantly comes to mind—a tart that combines all the best elements of these iconic cuisines: buttery pastry, sweet caramelized onions, fresh tomatoes, and creamy Gruyère cheese. This Tomato Onion Gruyère Tart is so delicious, it’s guaranteed to make you smile with every bite!

“Sometimes you just need a tart.”

Ingredients:

For the Pastry:

• 1 & 3/4 cups flour
• 1 tsp salt
• 2 tsp thyme
• 6 tbsp cubed butter (or 6 oz)
• 1 egg yolk
• 2 tbsp ice water

For the Filling:

Instructions:

• 1 medium Vidalia onion
• 2 tbsp butter
• 1/2 tsp olive oil
• Dash of black pepper
• 1 tbsp balsamic glaze
• 8 large tomatoes
• 2 tbsp pesto
• 2 garlic cloves (minced)
• 1/4 tsp salt
• 2-3 large tbsp Dijon mustard
• 3/4 cup Gruyère cheese (grated)
• 1/4 cup Parmesan cheese (grated)

1. Prepare the Onion Filling: Thinly slice the Vidalia onion. Heat the butter and olive oil in a pan over medium heat, then add the onions. Sauté them for 10-12 minutes until soft and caramelized. Add a dash of black pepper and balsamic glaze, stirring to coat. Remove from heat and set aside.
2. Make the Pastry: In a food processor, combine the flour, salt, and thyme. Add the cubed butter and pulse until the mixture resembles coarse crumbs. In a small bowl, whisk together the egg yolk and ice water, then add this to the mixture. Pulse until the dough begins to form. Turn it out onto a floured surface, knead it a few times, then wrap it in plastic wrap and chill for at least 30 minutes.
3. Prepare the Tomatoes: Slice the tomatoes and place them in a bowl. Coat them with the pesto and minced garlic, then sprinkle with 1/4 tsp salt. Allow the tomatoes to sit for 30 minutes to release their juices and intensify the flavors.

1. Assemble the Tart: Preheat your oven to 425°F (220°C). Roll out the chilled pastry dough on a lightly floured surface to fit a tart pan. Press it into the pan and trim any excess dough. Spread a thin layer of Dijon mustard over the base of the pastry. Then, layer the caramelized onions, followed by the pesto-coated tomatoes.
2. Top with Cheese: Sprinkle the Gruyère and Parmesan cheeses evenly over the tomatoes.
3. Bake: Place the tart in the oven and bake for 30-35 minutes, or until the edges of the pastry are golden brown and the cheese is melted and bubbly.
4. Finishing Touch: Remove the tart from the oven and top with fresh basil for a fragrant, flavorful garnish.
5. Serve & Enjoy: Slice, serve, and indulge in this gorgeous tart! It’s perfect as a main dish, side, or even as an appetizer.

YouTube video here https://youtu.be/hN_B2VNlyqs?si=Q1lTTu6zZuBEMjTq

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This Tomato Onion Gruyère Tart brings together the best of France and Italy, creating a perfect balance of savory, tangy, and rich flavors. Whether you’re hosting a dinner party or simply craving something comforting, this tart is sure to impress.

So, next time you’re in need of something delicious, remember: Sometimes, you just need a tart. 💛

A special shout-out to Osvaldo Sepulveda for the beautiful camera work that captured every moment, and as always, my apron from Maison d’ Heroine Faience made the process even more stylish!