Unlike most pastries where you rub the butter into the flour, the pastry for this tart is made by beating the butter, sugar and water together then adding the flour – which is a little easier. Once the pastry has rested all you have to do is combine the filling ingredients and your tart is done. Except that is for arranging the strips in a lattice pattern over the top, perhaps the fiddliest bit, but well worth it for how terrific it looks when cooked.