Preheat your oven to 180°C / 350-375°F / Gas Mark 4-5.
Remove frozen puff pastry from the freezer and set on the bench to thaw.
Working one by one, place thawed puff pastry sheet onto a chopping board and use a butter knife to spread a layer of the Nutella. Note 4, 5
Starting at one edge, roll the pastry sheet tightly. Wrap in cling wrap and freeze for 30 mins. Note 6
Remove pastry from the freezer, place on chopping board and use a sharp knife to cut into portions.
Transfer the cut pinwheels to the silicon baking mat (or parchment paper). Place the tray into the oven and allow the scrolls to bake for 15 - 20 mins.
When the timer is up, check that the pastries are done, then turn the oven off, but leave the tray in so that the scrolls can start to cool.
After 5 mins, use an oven mit and remove tray from the oven. Use a flat flexible turner and lift the Nutella puff pastry pinwheels onto a cooking rack.
Sprinkle with sifted icing sugar and crushed pistachios.