Heat the milk with the Stand & Overrun (1) and the vanilla pod.
Beat the yolks with the granulated sugar to a ribbon.
Add the custard powder.
Pour half the hot milk over the mixture.
Whisk and add the mixture back to the pan.
Then bring to the boil for 2 minutes.
Add the rest of the liquid Stand & Overrun (2).
Pour into the puff pastry moulds and leave in the fridge overnight.
Fill with the flan mixture and store in a cool place.
Leave to cool for at least 10 hours.
Bake for 30 minutes at 160°C then 10 minutes at 150°C.