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Baked tomato tart with thyme and basil on a baking tray.

Easy Tomato Tart with Puff Pastry

This is the simplest tomato tart made with nothing but fresh heritage tomatoes, sticky onion jam, and crispy, flaky puff pastry scattered with onion seeds and thyme leaves. It's the perfect rustic tart for any time of day or night.
4.84 from 6 votes
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Prep Time: 10 minutes
Cook Time: 35 minutes
Total Time: 45 minutes
Servings: 12
Calories: 131kcal
Author: Deborah Rainford

Ingredients

  • 1 sheet all-butter puff pastry
  • ¼ to ⅓ cup onion jam
  • 1 lb mixed heritage tomatoes, various varieties
  • 1 egg, beaten
  • 1 tablespoon mixed seeds, poppy, onion, fennel seeds
  • Thyme leaves, picked from 1 bunch
  • Basil leaves, chopped from ½ bunch
  • Optional: Burrata or mozzarella cheese, honey for drizzling, truffle oil

Instructions

  • Preheat your oven to 400°F.
  • Place the puff pastry sheet on a baking paper-lined tray. Spread the onion jam onto the pastry, leaving a 2-inch border around the edges.
  • Thinly slice the tomatoes and arrange them on top of the jam, still respecting the 2-inch border. Sprinkle generously with sea salt.
  • Use a pastry brush to coat the pastry's border with beaten egg. Fold the edges over the tomatoes to form the tart.
  • Brush the folded pastry edges with more egg and sprinkle with the mixed seeds.
  • Sprinkle the thyme leaves evenly over the tart.
  • Bake on the tray for about 35 minutes, until golden and crispy.

Notes

  • Tomato Selection: Using a mix of heritage tomato varieties not only adds a burst of color but also introduces a range of flavors and textures to your tart.
  • Pastry Tip: Keeping the puff pastry cold until you're ready to use it ensures a flakier, more delicious crust.
  • Egg Wash: The egg wash gives your tart a beautiful golden sheen and helps seal the pastry edges.
  • Serving Suggestions: For an indulgent finish, add burrata or mozzarella on top of the baked tart. A drizzle of honey or a few drops of truffle oil can elevate the flavors further.
  • Storage: If you have leftovers, store them in an airtight container in the fridge for up to 2 days. Reheat in the oven to maintain the pastry's crispness.

Nutrition

Calories: 131kcal | Carbohydrates: 10g | Protein: 2g | Fat: 8g | Saturated Fat: 2g | Cholesterol: 13mg | Sodium: 57mg | Potassium: 107mg | Sugar: 1g | Vitamin A: 340IU | Vitamin C: 5.3mg | Calcium: 10mg | Iron: 0.9mg
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