Heat the oil in a large pan for deep frying. (CAUTION: Hot oil can be very dangerous. Do not leave unattended.)
Cut the pastry sheets into four lengthways.
Mix the apple, raisins, pistachios, orange zest and cinnamon. Place a small amount into the corner of the pastry and fold into triangles.
Seal with butter and repeat with the rest of the pastry and filling.
Deep fry for 2-3 minutes or until golden. Serve.