1.Preheat oven to 200°C.
2.Process nuts, sugar and butter until finely chopped.
3.Sprinkle one pastry sheet with half the nut mixture; fold two opposite sides of pastry inwards to meet in the centre. Flatten folded edges. Fold each side in half again to meet in the centre; flatten slightly. Fold two sides in half again to meet in the centre.
4.Repeat process with remaining pastry sheet and nut mixture. Cut pastry into 1cm (½-inch) slices; place, cut-side up, on baking paper-lined oven trays. Bake about 15 minutes; cool.
To give the pastry an extra golden shine, brush it with a little egg before baking. Serve topped with a scoop of ice cream, if you like, or sandwich with some nutella, or jam and whipped creamNote