Pastels do nata (Portuguese custard tart)

45 minutes + cooling ■ Makes 12 ■ TRICKY BUT WORTH IT

golden caster sugar 250g
lemon 2 slices
cinnamon sticks 2
semi-skimmed milk 250ml
plain flour 30g
cornflour 20g
vanilla extract a few drops
eggs 3 yolks, plus 1 whole egg
puff pastry 375g
flour, icing sugar and ground cinnamon for dusting and butter for the muffin tray

■ Tip the sugar, lemon and cinnamon into a pan with 125ml water and bring to a boil. Mix the flour, cornflour and vanilla with a small amount of milk until you have a smooth paste. Bring the rest of the milk to a boil, then pour it onto the flour mixture, whisking continuously. Pour back into a clean pan and bring to a simmer, whisking until the mixture thickens. Remove the cinnamon and lemon then stir both mixtures together and add the eggs, bring back to a simmer and whisk until smooth. Pour into a jug, cover the surface with clingfilm and allow to cool.
■ Heat the oven to 220C/fan 200C/gas 7 and put a baking sheet in the oven for bottom heat. Roll out the puff pastry on a clean work surface lightly dusted with flour and icing sugar. Cut the pastry in half and lay one sheet on top of the other. Roll the pastry sheets up like a Swiss roll and cut the roll into twelve slices about 1 cm - 2cm thick.
■ Lay each of the pastry slices flat on the work surface and roll them out into 10cm discs. Press a pastry disc into each of the wells of a buttered muffin tray. Divide the custard between the pastry cases.
■ Bake the tarts for 18-20 minutes on the preheated baking sheet, or until the custard has puffed up and is pale golden-brown, and the pastry is crisp and golden-brown. Allow to cool in the tin. Before serving dust with some cinnamon and icing sugar.

Pastels do nata (Portuguese custard tart)