www.jewishcookery.com
Make the pastry by mixing all the ingredients together in a food processor.
Wrap in cling film and flatten. Leave to rest for 30 minutes.
Add the sultanas, cinnamon, chopped walnuts, sugar, and butter to the food processor and pulse gently to combine.
Stir in the grated apple.
Preheat the oven to 200°C.
Roll out the pastry on a floured surface so it is 0.3cm thick.
Using a 7.5 cm cutter make round templates.
Put a spoonful of filling into each circle.
Draw up the sides to form a triangle, pinching the edges firmly together in the shape of a tricorn hat.
Line a baking tray with parchment paper.
Transfer the hamantaschen and glaze with the egg white.
Sprinkle with the hundreds and thousands and bake for 15 -20 minutes or until golden brown.