Chestnut tartlets

This is based on a traditional Maltese recipe, pastizzotti tal-qastan, which I first came across in The Food and Cookery of Malta by Anne and Helen Caruana Galizia. Chestnuts are much used in winter cooking in the Maltese islands and imbuljuta, a thick and warming chestnut, orange and chocolate ‘soup’, is served after Christmas midnight mass. I have used the orange flavouring in these crisp pies, perfect for an afternoon tea over the Ch