Heirloom Tomato Tart

Nestled in a buttery, crisp puff pastry shell, vibrant colors of heirloom tomatoes, tangy dijon mustard and the soft flavors of herbs de Provence, seamlessly all shine through beautifully in this French Tomato Tart.

It’s juicy yet savory and can be made in an hour!

Heirloom Tomato Tart | URBAN BAKES

In the very short window between the end of Summer and the beginning of Fall, heirloom tomatoes are at their best. Though spotted in some grocers year round (usually tucked in the corner somewhere between the beefy and cherry tomatoes), it’s during this season when there’s a sudden abundance. Before you know it, in a blink of an eye, most are gone. This is the time to grab a few.

As you might agree, most tomatoes are quite juicy and heirlooms are no exception. However, they’re almost always excessively plump. Their skin feels tight and their body is quite firm which leads to a meaty tomato; a great quality to make slicing through much easier. I have yet to come across an heirloom tomato that fell apart or oozed out all of their juice when cut. Therefore, heirlooms are naturally heftier in weight.

Fresh Heirloom Tomatoes | URBAN BAKES

Aside from their wonderful flavor that I’ll get to in a minute, can we take a moment to discuss their unique appearance? Is it just me or are you too, fascinated by their beauty? From the assortment of vibrant colors, striations and unique shapes, I’m in awe when I see a basketful.

But it’s the ones with the deep grooves that catch my eye. Some of these grooves are so deep they look as if someone took a string around its body, squeezed it and is about 2 milliseconds away from bursting! When sliced through, the grooves are nothing more than just an indentation in the roundness of the tomato. Quite anticlimactic if you ask me. Not sure what I was hoping to see with that.

Heirloom Tomato Tart | URBAN BAKES

Comparing flavor to colors of red-orange to green and from yellow to purple, much like a bag of M&M’s, the tomatoes all taste the same. That may have come as a disappointment or as a surprise depending on how you look at it. Personally, I was a little bummed discovering this after a few trips to the store. Not going to deny it, they’re a little pricey at $2.99 to $3.99 per pound. Keep in mind, they’re heavier than they look so the price can rack up rather quickly.

Because of this, I started with a green one, liked it and went back to get more colors of the rainbow. Some were sold out so I went back for a third trip. In the end, they ALL taste the same. I don’t know what I was thinking. I guess I thought each color, like a bag of Skittles, was going to taste a little different. Nope! Bottom line, I was not disappointed in the overall flavor. If given the option, I would choose an heirloom tomato, every time!

Heirloom Tomato Tart | URBAN BAKES

When you bite into an heirloom tomato, your taste buds are pleasantly awakened by the light sweetness compared to a traditional tomato. And is noticeably much less acidic. You can immediately sense the difference from a red tomato, as they can sometimes taste sour and give a sharp zing in the back of your jaw. Then, there are other times when a red tomato just simply tastes bland, no oomph to it. Heirlooms don’t disappoint!

I was only disappointed thinking each color was going to taste different from the other. Ha!

Heirloom Tomato Tart | URBAN BAKES

With a basketful of my own heirloom beauties and colorful cherry tomatoes, I was inspired to create a French Tomato Tart. What better way than to try a recipe from The French Cooking Academy?

Now, don’t knock it till you try it, this recipe calls for dijon mustard. Yes, you read that right, dijon. Holy bejesus, this tart is phenomenal. Since posting the second image from the top onto Instagram, I already made this exact recipe 3 to 4 times to date. Perfect every time. And is extremely easy to put together.

I made some minor tweaks from the original by placing the seasoning under the tomatoes rather than on top – found it didn’t burn doing it this way. And I used frozen [boxed] puff pastry to speed up the process. There are similar recipes that use traditional pie crust but the biggest component that lacks, is the crispness that puff pastry delivers. All-in-all, I highly recommend making this tart. Whether you’re trying something new or want to slap a quick dinner together in an hour, this is a must try and could be your next go-to recipe!

Did you enjoy this recipe? Consider rating and commenting below. I love to see your feedback and help answer any questions you may have. And don’t forget to check below for related recipes.

clock clock iconcutlery cutlery iconflag flag iconfolder folder iconinstagram instagram iconpinterest pinterest iconfacebook facebook iconprint print iconsquares squares iconheart heart iconheart solid heart solid icon
Heirloom Tomato Tart | URBAN BAKES

Heirloom Tomato Tart

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

No reviews

  • Author: URBAN BAKES
  • Total Time: 1 hour
  • Yield: 12x8 inch 1x
  • Diet: Vegetarian


Nestled in a buttery, crisp puff pastry shell, vibrant colors of heirloom tomatoes, tangy dijon mustard and the soft flavors of herbs de Provence, seamlessly all shine through beautifully in this French Tomato Tart.


  • 1 sheet (246 grams) puff pastry, thawed
  • 2 tablespoons (25 grams) dijon mustard
  • 3 to 4 tablespoons (47 to 62 grams) tomato sauce
  • 1/4 cup (28 grams) bread crumbs
  • 2 teaspoons (3 grams) fresh thyme, stems removed
  • 2 teaspoons (5 grams) herbs de Provence
  • 3 heirloom tomatoes of varying size and color, sliced 1/4-inch thick
  • 3 tablespoons (42 grams) extra virgin olive oil
  • 1 to 2 teaspoons (6 to 12 grams) crushed pink Himalayan salt or Kosher salt
  • ground black pepper (optional)



  1. Heat oven to 425°F (220°C). Line a large baking sheet with a silicone baking mat or parchment paper. 
  2. On a lightly floured surface, roll puff pastry out to 13×9 inches (33×23 cm). Carefully transfer pastry onto the lined baking sheet. To create a crust, fold the corners of the pastry inward about 1 inch (2.5 cm) then, fold the sides inward about 1 inch overlapping the folded corners to make the total size of the rolled puff pastry to 12×8 inches.
  3. Using an angled spatula or spoon, carefully spread dijon mustard over the puff pastry.  Avoid spreading over the folded sides. Spread 3 tablespoons of tomato sauce over the dijon mustard. If more sauce is desired, add an extra tablespoon. To absorb the sauce, sprinkle bread crumbs on top. Evenly sprinkle thyme and herbs de Provence over the bread crumbs. Arrange a single layer of tomato slices over the top, avoiding the sides of the folded pastry.  It is okay to slightly overlap the tomatoes. Drizzle olive oil over the tomatoes. Season with salt and pepper.
  4. Bake for 35 to 40 minutes or until the sides have risen and golden brown. Remove from heat and allow the tart to rest for 10 minutes before slicing and serving. ENJOY! 
  • Prep Time: 10 minutes
  • Cook Time: 40 minutes
  • Cuisine: French

Tomato Recipes

Leave a Comment

Your email address will not be published. Required fields are marked *

Recipe rating 5 Stars 4 Stars 3 Stars 2 Stars 1 Star

Craving More?

Sign up for Weekly Recipes, Special Offers, Giveaways & More!