Dessert: The custard tart is famous all around the globe : flan pâtissier in France, Pasteis de nata in Portugal or pinyin ...

For this recipe you will need a heavy, flat baking tray and a 25cm/10in fluted flan tin. For the pastry, put the flour, icing sugar and cocoa powder into a large bowl and mix them together.

But do not make the pastry too wet — it should come away cleanly from the bowl. Flatten into a round and wrap in parchment paper and rest in the fridge for 15 minutes. Line the flan ring.