Sift flour, add salt and sugar if for a sweet dish.  Rub in fat or butter with tips of fingers.  Pour the water in the centre slowly making a stiff dough that will leave the sides of the dish clearly.  Tip out onto floured board and knead slowly with tips of fingers and thumbs.  Then turn rough side down and roll out to required size.  

Roll out to plate size.  Place pastry in the bottom of the pie dish and cover with the jam.  Bake in a hot oven for 15 minutes.