Rub in the butter until the mixture resembles breadcrumbs.
Add water to the flour and mix with your hands. The pastry should be of an even color and consistency for rolling.
Divide the pastry into two halves. Take one half and roll it out so that it is big enough to cover a 20-cm pie dish. Trim the edges with a knife using the edge of the pie dish as your guide.
Cover the pastry with the sliced apples and sprinkle with sugar.
Roll out the other half of the pastry. Moisten the edge of the bottom layer of pastry and place the second piece on top.
Trim off any excess pastry with a knife in a downward motion, again using the edge of the pie dish as your guide.
Flute the edges with a pinching action using your fingers and thumb.
Prick the surface of the pastry lightly before placing the pie in the oven. Cook for 20 to 30 minutes at 180 °C.
Serve, dusted with caster sugar and a dollop of cream.