Take out the dough.
On a floured surface or covered with baking paper, roll out the dough with a rolling pin.
Line the bottom and edges of the tin with the dough and cut off any excess dough.
Use a baking tin with removable bottom or line the tin with baking paper.
Pour the flan preparation over the dough and smooth with a spatula.
Bake at 200°C for about 40 minutes.
Cover the flan with aluminium foil after 25 minutes.
Check the baking time after 30-35 minutes. The custard should be well set.
Ideally, prepare it the day before and leave it in the fridge for several hours before eating.
Just before serving, crush the pistachios with a mortar and sprinkle the pistachio chips over the flan.