Savory Tomato Basil Tart

The summer my neighbor decided to plant twenty heirloom tomato plants was the same summer I discovered this tart. She kept appearing at my back door with baskets of sun-warmed Brandywines and Cherokee Purples, apologizing for her overenthusiastic gardening. I made this tart three times that week, and honestly, nobody complained about the repetition.

I once served this at a brunch where two people announced they did not like tomatoes. They both went back for seconds, and one of them actually asked for the recipe before leaving. Sometimes the right preparation changes everything.

Ingredients

• Puff pastry: I keep a stash in my freezer for exactly these kinds of moments when something beautiful needs to happen fast
• Ripe tomatoes: The kind that still smell like sunshine when you slice them, slightly soft but not mushy
• Fresh mozzarella: Buffalo mozzarella if you can find it, otherwise the regular kind works perfectly
• Parmesan cheese: The real stuff grated fresh makes a noticeable difference in the final flavor
• Crème fraîche: Heavy cream works too but crème fraîche adds this lovely slight tang that cuts through the rich cheese
• Fresh basil: Only fresh will do here, dried basil would be sad and out of place
• Dijon mustard: This is the secret ingredient that makes people ask what is in this tart

Instructions

Preheat your oven to 200°C (400°F)

While the oven heats, roll out your puff pastry and press it gently into your tart pan, letting the corners fold naturally

Prick the pastry base all over with a fork

This little trick prevents the bottom from puffing up too dramatically while baking

Spread the Dijon mustard over the base

A thin, even layer is all you need, think of it as a flavorful foundation for everything that follows

Whisk together the custard mixture

Beat the egg with crème fraîche, half the Parmesan, chopped basil, salt, and plenty of black pepper until smooth

Pour the mixture over the mustard

The custard should settle into the pastry without overflowing

Arrange mozzarella and tomatoes

Layer mozzarella slices first, then arrange tomatoes in slightly overlapping circles or rows however feels pleasing to your eye

Finish with olive oil and remaining Parmesan

Drizzle the oil generously over the tomatoes and scatter the rest of the cheese on top

Bake until golden and set

Thirty to thirty-five minutes usually does it, the pastry should be deeply golden and the filling firm to the touch

Let it rest briefly before serving

Ten minutes of cooling makes all the difference for clean slices, though I have been known to test it immediately

Save

This tart has become my go-to for those nights when friends drop by unexpectedly and I want to serve something that feels special without actually spending hours in the kitchen. There is something about the combination of warm pastry and sweet tomatoes that makes people linger at the table longer than they planned.

Choosing the Right Tomatoes

I have learned that beefsteak or vine-ripened tomatoes work best here because they hold their shape beautifully during baking. Cherry tomatoes can be used whole but they will burst and release more moisture, which you might want to account for by reducing the cream slightly.

Making It Ahead

The tart can be assembled several hours before baking and kept covered in the refrigerator, though the pastry may become slightly less flaky. I prefer to bake it fresh and serve it at room temperature, which is actually how the French often enjoy tarts anyway.

Serving Suggestions

A simple arugula salad dressed with lemon vinaigrette cuts through the richness perfectly. I have also served this alongside roasted asparagus or steamed green beans when I want something more substantial.

• A chilled rosé from Provence feels almost mandatory with this tart
• Extra fresh basil scattered on top right before serving adds brightness
• The leftovers, if there are any, make excellent next-day lunch straight from the refrigerator

Save

There is something deeply satisfying about a dish that looks this impressive coming out of the oven but requires so little active effort. That is probably why I keep making it, summer after summer, whenever the tomato season arrives.

Recipe FAQs

→ Can I make this tart ahead of time?

Yes, you can prepare the tart up to 4 hours in advance and serve it at room temperature, which allows the flavors to meld beautifully. The pastry will stay crisp for several hours after baking.

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

Spread the Dijon mustard on the pastry base before adding the creamy filling—this creates a protective barrier. Also ensure your oven is fully preheated to 200°C (400°F) before baking.

→ Can I use cherry tomatoes instead of sliced tomatoes?

Absolutely! Cherry or grape tomatoes work wonderfully. Simply halve them and arrange cut-side up. They'll concentrate their sweetness during baking and add lovely color to the tart.

→ What other cheeses can I use?

Goat cheese (chèvre) adds a pleasant tang, while feta provides a salty contrast. You can also blend Gruyère or Swiss cheese for a nuttier flavor profile that pairs beautifully with basil.

→ Do I need to remove seeds from the tomatoes?

Not necessarily. For extra moisture control, you can gently scoop out some seeds and juice before slicing, but with ripe medium tomatoes, this step isn't essential if you bake until golden and set.

→ Can I freeze this tart?

The unbaked assembled tart freezes well for up to 1 month. Wrap tightly in plastic and foil, then bake from frozen, adding 5-10 minutes to the baking time. Already baked leftovers can be frozen though the texture may soften slightly.