Savory Tomato Basil Tart

The first time I made this tart was on a rainy Sunday when my garden tomatoes were ripening faster than we could eat them. I had fresh basil threatening to bolt, and a lingering craving for something French and comforting but not too heavy. The smell of Dijon mustard wafting from the oven made my kitchen feel like a tiny bistro in Provence.

I served this tart at my book club last spring, and everyone kept asking for the recipe while picking at the last crumbs on their plates. My friend Sarah, who claims to hate cooked tomatoes, went back for seconds and sheepishly admitted she was converted. Now whenever someone asks what to bring to a summer potluck, this is my instant recommendation.

Ingredients

• Puff pastry sheet: Keep it cold until you're ready to use it. A chilled pastry creates the flakiest layers and prevents shrinking in the oven.
• Ripe tomatoes: Choose tomatoes that give slightly when pressed but aren't mushy. Too-juicy tomatoes will make your tart soggy.
• Fresh mozzarella: Drain it on paper towels for 15 minutes before slicing to remove excess moisture.
• Crème fraîche: This French cream adds a subtle tang that cuts through the richness. Heavy cream works but crème fraîche is worth seeking out.
• Dijon mustard: Spread it thinly over the pastry base. It creates a barrier that keeps the custard from making the crust soggy.
• Fresh basil: Add the chopped basil to the custard mixture, then use whole leaves as garnish for a pop of color.

Instructions

Prepare the pastry shell:

Roll out the puff pastry and gently press it into your tart pan, letting the excess hang over the edges. Trim the pastry with kitchen shears for a clean edge, then dock the base by pricking it all over with a fork. This prevents those dreaded puffy bubbles from forming under the filling.

Build the flavor foundation:

Spread the Dijon mustard in a thin, even layer over the bottom of the pastry. Don't worry if it looks like too little. The mustard mellows during baking and provides a subtle sharpness that makes all the difference.

Whisk the creamy custard:

In a bowl, beat the egg until frothy, then whisk in the crème fraîche until smooth. Stir in half the Parmesan and the chopped basil. Season generously with salt and pepper, remembering that the cheese will add saltiness.

Assemble the tart:

Pour the custard over the mustard-coated pastry. Arrange the mozzarella slices evenly across the surface, then layer the tomato slices in overlapping circles. Drizzle with olive oil and finish with the remaining Parmesan.

Bake to golden perfection:

Bake at 200°C (400°F) for 30 to 35 minutes. The pastry should be deeply golden, the custard set, and the tomatoes slightly shriveled and concentrated in flavor.

Save

Last summer my neighbor came over for coffee and spotted the tart cooling on my counter. She said it reminded her of her semester in Lyon, where she ate something similar at a tiny café near the university. We ended up sitting there for two hours, sharing slices and trading travel stories while the basil scent drifted through my open windows.

Choosing the Right Tomatoes

Roma or plum tomatoes work beautifully here because they're fleshy with fewer seeds and less water. Heirloom varieties make the tart stunning but can be quite juicy. If using beefsteak tomatoes, slice them thicker and give them extra time to drain on paper towels before assembling the tart.

Making It Ahead

You can fully assemble the tart up to four hours before baking and keep it refrigerated. Add ten minutes to the baking time if baking from cold. The mustard barrier prevents the pastry from getting soggy, making this an excellent do-ahead option for entertaining.

Serving Suggestions

This tart shines as a light lunch with a simple arugula salad dressed in lemon vinaigrette. For dinner, pair it with roasted asparagus or a fresh grain salad. And don't forget that glass of chilled rosé or a crisp white wine like Sauvignon Blanc.

• Goat cheese works beautifully in place of mozzarella and adds a tangy kick
• Try adding herbes de Provence or thyme for a more earthy flavor profile
• Shallots thinly scattered under the tomatoes add lovely sweetness and depth

Save

There's something deeply satisfying about a tart that looks so elegant and comes from such humble ingredients. Every slice feels like a small celebration.

Recipe FAQs

→ Can I make this tart ahead of time?

Yes, you can assemble the tart up to a day in advance and refrigerate it unbaked. Add an extra 5-10 minutes to the baking time if baking cold. Alternatively, bake it completely and serve at room temperature, which actually enhances the flavors.

→ What's the best way to prevent a soggy bottom crust?

Pricking the pastry base with a fork before baking helps steam escape. The layer of Dijon mustard also acts as a barrier. Avoid overloading with too many tomato slices, and pat them lightly with paper towels to remove excess moisture before arranging.

→ Can I use different cheeses?

Absolutely. Goat cheese (chèvre) adds tanginess, while feta brings a salty punch. Gruyère or Swiss cheese works well too. You can also mix multiple cheeses for more complex flavor. Adjust quantities to maintain similar consistency.

→ Do I need to peel the tomatoes?

No need to peel the tomatoes—the skins add texture and hold the slices together during baking. However, for a more delicate mouthfeel, you can blanch them in boiling water for 30 seconds, then peel before slicing.

→ What should I serve with this tart?

A crisp green salad with vinaigrette complements the richness perfectly. For brunch, add fresh fruit or roasted potatoes. A chilled rosé or dry white wine pairs beautifully. The tart also stands alone well as a light lunch with just a simple side salad.

→ Can I freeze this tart?

Freezing isn't recommended once baked, as the texture of tomatoes and cream filling deteriorates. However, you can freeze the unbaked assembled tart for up to 2 months. Wrap tightly and bake from frozen, adding about 10-15 minutes to the cooking time.