Preheat the oven to 220°C (425°F). Line a baking sheet with parchment paper. Unroll the puff pastry and place both pieces on top of each other.
Whisk the egg and brush it over the puff pastry.
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Wash the tomatoes and slice them into 12 slices.
Tomato Slices
Distribute the tomato slices evenly over the puff pastry and season with salt and pepper.
Cut the puff pastry into 12 equal-sized squares. Place the puff pastry pieces on the baking sheet, leaving some space between them. Bake for 18 minutes until golden brown.
Peel the garlic and press it into a bowl. Finely chop the basil and add it to the garlic along with the olive oil.
Garlic Oil
As soon as the puff pastry tomato squares come out of the oven, brush them with the garlic and basil oil.
Bake Tomato Puff Pastry Squares
If you like, grate some fresh Parmesan cheese over them.
