Puff Pastry Tomato Tart

Looking for a delicious and beautiful way to cook with summer tomatoes? Try this French-inspired Puff Pastry Tomato Tart. Made with a flaky, buttery crust, Dijon mustard, caramelized onions, savory herbs, and Gruyère cheese, this tomato tart is easy to assemble and makes a perfect appetizer or light main course. Whether you’re entertaining guests or simply looking for a tasty meal, this rustic tart is sure to become a new favorite in your recipe collection.

Ingredients:

3-4 medium ripe, firm tomatoes (preferably heirloom)

1 sheet Dufour puff pastry , fully defrosted 

2 tablespoons Dijon mustard (smooth or a mix of grainy and smooth)

1-¼ cups shredded Gruyere cheese , divided

½ cup caramelized onions (approximately ½ linked recipe)

1 tablespoon chopped fresh herbs (such as thyme, parsley, rosemary, tarragon, and basil)

1 large egg

1 teaspoon cool water

extra virgin olive oil , optional (for drizzling)

kosher and/or sea salt and coarsely-ground black pepper