This roasted tomato cheese tart is the perfect summer meal for Meatless Monday or any day of the week. The smoked Gruyère cheese with fresh vine-ripened tomatoes was a really nice combination. Hurry up and try this before summer is over because it’s going by so fast!

Summer brings an abundance of vine-ripened tomatoes everywhere. When they start coming off the vine, there never seem to be enough recipes to keep these beauties from spoiling. If you want a tomato recipe, this roasted tomato cheese tart may be exactly what you are searching for.
I made this tart last week from some beautiful tomatoes I bought at the farmers’ market. David and I gave up on growing tomatoes. We don’t like the quality we get from tomatoes grown in pots, and you’ve heard about our critter horror stories.
We have accepted that we have been defeated and are happy to rely on our local farmers for produce. Not to mention the fact that we are a little lazy… Actually, no, I take that back. We get up every day at the butt-crack-o-dawn to commute to the city. That’s over 500 miles a week to go to work. No, we are not lazy. Crazy? Maybe…

What Is A Tomato Tart?
This roasted tomato tart is easy to make, using frozen puff pastry dough as the soft, warm, pillowy bed for the vine-ripened tomatoes to rest, with Dijon mustard and smoked Gruyère cheese, seasoned with fresh thyme, salt, and pepper, garnished with fresh basil.
Think of this tomato tart like a pizza without tomato sauce and a lot fresher!

Tomato Tart Ingredients and Substitutions
This tart uses store-bought puff pastry dough instead of a traditional pastry crust or pie crust. The recipe card at the end of this post lists the full ingredient list with measurements.
Puff Pastry Dough: You’ll need a 10-inch defrosted sheet of frozen puff pastry.
Mustard: Dijon mustard adds a zesty flavor that compliments the savory tart.
Cheese: David and I love our smoked cheeses. I use smoked Gruyère cheese slices. Regular Gruyère, Swiss cheese, Havarti, or gouda are good substitutes.
Tomatoes: Use any variety of fresh, vine-ripe tomatoes sliced ¼-inch thick. Heirloom tomatoes, plum tomatoes, or cherry tomatoes are perfect!
Seasoning: Kosher salt and freshly cracked black pepper
Fresh Herbs: Thyme and Basil

How To Make This Tomato Tart
Don’t let the puff pastry intimidate you. It’s so much easier to work with than traditional pastry dough. I’ll summarize this recipe below. The recipe card at the end of this post provides detailed instructions with time and temperature.


Step 1: Preheat the Oven and Prepare A Sheetpan
Lightly grease a baking sheet or line with parchment paper; set aside.
Step 2: Salt the Tomatoes
Salting tomatoes helps to drain excess moisture from the tomatoes. This will keep your tart from becoming soggy.
- Slice the tomatoes into ¼-inch thick slices. Lay on a paper towel and sprinkle with salt.
- Flip and salt the other side.
- Allow the tomatoes to sit for 5 minutes.
Step 3: Prepare the Puff Pastry
- Roll out the pastry sheet until it is long enough to fit into the baking sheet, and place the pastry sheet onto a baking sheet.
- Score a line about 1 inch from the edge around the perimeter with a knife. Poke the dough with a fork inside the scored lines. Spread the mustard onto the pastry within 1 inch of the edge. Then top with cheese slices, trying to cover the area inside the border as best you can.

Step 4: Layer the Ingredients
Lay the tomato slices over the mustard-covered pastry, overlapping as needed. Season with salt and pepper to taste and sprinkle with thyme leaves.
Step 5: Bake the Tart
Bake in the oven for 20 to 25 minutes or until the pastry is crisp and slightly browned on the edges.
Cool, Slice, and Enjoy
Allow the tart to cool slightly for about 5 minutes. Cut the tart into 8 squares and garnish with fresh basil leaves. Serve the tart hot, warm, or at room temperature.
Tips for Making A Tomato Tart
- Don’t skip salting the tomatoes. Tomatoes are very watery, and salt helps draw out excess moisture. Salting tomatoes keeps your tomato tart from becoming soggy.
- Brush the puff pastry with egg wash from a prettier golden brown crust with sheen.
- Use caution when seasoning the tomato tart before baking. The tomatoes are already salted. Season to taste.
Making this recipe? We’d love to hear your feedback. Leave us a comment and a star rating below. We really appreciate it!
See ya on the mountain!

Roasted Tomato Tart With Cheese
Ingredients
- 1 10-inch sheet frozen puff pastry defrosted
- 2 to 4 tablespoons Dijon mustard
- 6 to 8 smoked Gruyère cheese slices Regular Gruyère or Swiss cheese will work
- 6 medium ripe tomatoes sliced ¼-inch thick
- Kosher salt and freshly cracked black pepper
- 1 tablespoon fresh thyme
- fresh basil leaves to taste, for garnish
Instructions
Preheat the Oven and Prepare a Baking Sheet
- Preheat the oven to 400 degrees F. Lightly grease a baking sheet or line with parchment paper; set aside.
Salt the Tomatoes
- Slice the tomatoes into ¼-inch thick slices. Lay on a paper towel and sprinkle with salt. Flip and salt the other side. Allow the tomatoes to sit for 10 minutes. After 10 minutes, blot the tomatoes with a papertowel.
Prepare the Puff Pastry
- Unfold the pastry sheet and roll it out with a rolling pin until it is long enough to fit into the baking sheet. Place the pastry sheet onto a baking sheet, pressing and reshaping to fit the pan as close to size as possible.
- Using a knife score a line about 1-inch from the edge around the perimeter. Poke the dough with a fork inside the scored lines. Spread the mustard onto the pastry within 1 inch of the edge. Then top with cheese slices trying to cover the area inside the border the best you can.
Layer The Puff Pastry and Ingredients
- Lay the tomato slices over, mustard covered pastry, overlapping, as needed. Season with salt and pepper, to taste and sprinkle with thyme leaves.
Bake
- Bake in the preheated oven, for 20 to 25 minutes, or until the pastry is crisped and slightly browned on the edges.
Cool, Slice and Enjoy!
- Allow the tart to cool slightly for about 5 minutes. Cut the tart into 8 squares and garnish with fresh basil leaves. Can be served hot, warm or at room temperature.






givememeatloaf says
Lately you have basically been making everything I’ve been craving – it’s really uncanny! 😀 Love the dijon mustard in the recipe – having a girls night soon and plan to make this!
Teresa Blackburn says
Debbie this is just beautiful and now I know what I am going to make with my next batch of homegrowns! Really wonderful post.
The Mountain Kitchen says
Thanks Teresa. Enjoy the recipe!
Liz says
Oh boy-it’s so delicious. I am drooling!
The Mountain Kitchen says
Thanks Liz! ?
victorialise says
Wow, definitely going to have to try this! Will be a perfect addition to our vegetarian meals. Thanks for sharing!! -Tori, from the Colorado Rocky Mountains x
The Mountain Kitchen says
It’s a great way to use up tomatoes. Hope you enjoy it, fellow mountain friend! 🙂
CakePants says
This looks so beautiful and delicious! The colors in this are so striking, and I love recipes that rely on fresh, seasonal produce. Unfortunately, I don’t have a green thumb, but thank goodness for farmers markets!
The Mountain Kitchen says
Thank you! We have to rely on the farmers too. Nothing wrong with that! Hope you will give this a try. Have a great weekend… it’s almost here!
The Vegetarian Cooking Couple says
Looks so good! Nothing like a good fresh tomato.
The Mountain Kitchen says
So true! Thank you! 🙂