Preheat your oven to 400°F (200°C/Gas 6).

Prepare a baking tray by lining it with baking paper.

Take the puff pastry sheet out of the refrigerator and let it rest for a few minutes before unrolling it. Cut the pastry into equal-sized square pieces and fold each square diagonally to create triangle shapes.

In a small bowl, combine an egg with a tablespoon of water and whisk. Brush this egg wash over the pastry triangles.

Place the tray in the preheated oven and bake for about 20 minutes until puffy and golden.

While the pastries are baking, whip the heavy cream with sugar until stiff peaks form.

Slice the strawberries into thin pieces.

Once the pastries are baked and cooled slightly, slice each one open and pipe whipped cream inside before topping with strawberry slices.

Dust with icing sugar just before serving.