Prep. time: 40 minutes
Baking time: 25 minutes

Pastry cream recipe

1. Butter a tart mold or pie plate; roll out the puff pastry and line the mold; prick all over with a fork to prevent it from swelling up.
2. Brush the edges with an egg yolk beaten with 1 tbsp. water.
3. Fill with the pastry cream.
4. Arrange the apple slices on the pastry cream in a rosette pattern; sprinkle with sugar and cinnamon.
5. Bake in a preheated 220° C / 450° F oven for about 25 minutes. 

Serving 

1. Serve warm or cold; 
2. flambé with calvados if desired; 
3. whip the cream with the sugar and top each slice with a spoonful of whipped cream just before serving. 

Variation

1. combine 125 ml (1/2 cup) brown sugar with a little melted butter and a pinch of flour; 
2. sprinkle over the pie before baking.