In the work bowl of a food processor, pulse together flour, confectioners’ sugar, and salt until combined. Add cold butter, pulsing until large crumbs form. Add egg, lemon zest, lemon juice, and 2 tablespoons ice-cold water, pulsing until dough comes together.
Turn out dough onto a clean counter, shape into a 1-inch-thick disk, wrap tightly in plastic wrap, and refrigerate for at least 1 hour and up to a day before using.
Recipe by TeaTime Magazine at https://teatimemagazine.com/yorkshire-curd-tartlets/