Roll out the puff pastry in a baking dish and prick it all over with a fork. Preheat the oven to 350°F (180°C).

Spread the applesauce evenly over the pastry using a spoon.

Wash, peel, and slice the apples into thin wedges. Wash and slice the strawberries.

Arrange the apple and strawberry slices over the applesauce as you like.

Sprinkle with vanilla sugar, drizzle with melted butter, and sprinkle with light brown sugar. Bake for 30 minutes. Let cool for about an hour. For an extra treat, add a scoop of vanilla ice cream.