Preheat the oven to 200C/Fan 180C/Gas Mark 6. Unroll the pastry on a floured surface then use a 7.5cm/ 3in fluted round cutter to press out 12 circles of pastry. reserve the pastry scraps. Press the circles into the base of a 12 hole patty tin. Prick the bases lightly with a fork. Place half a teaspoon of lemon curd in the base of each tart.
Place the cheese, eggs, sugar, lemon zest and plain flour together in a large bowl and beat together until smooth. Divide the mixture between the pastry cases.
Re-roll the remaining pastry scraps on a floured surface and cut into 1cm wide strips. Brush these with a little milk then place a cross of pastry on top of each tart. Brush with more milk. Bake for 20-25mins or until the tops are golden brown. Leave to cool before serving. Once made these will keep fresh for 2-3 days in an airtight container.