Roll out the pastry, cut crosswise into 4 equal strips, place on a baking tray lined with baking paper. Sprinkle the pastry strips with sugar.
Approx. 12 mins. in the centre of an oven preheated to 220°C. Remove from the oven, slide onto a cooling rack and allow to cool.
Beat the cream, sugar and lemon zest until stiff. Spread the whipped cream on top of 3 pieces of puff pastry, top with 3/4 of the strawberries. Stack the pastry pieces on top of each other and place the remaining piece of pastry on top. Cover with the remaining strawberries, sprinkle with pistachios and dust with icing sugar.