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Bake for 15-20 mins, or until golden and crisp. Gently push down the middle with the back of a spoon, then leave to cool completely.
Whisk the mascarpone with the double cream and 3 tbsp lemon curd until soft and spoonable. Fold in another 3 tbsp lemon curd and the seeds of 1 passion fruit.
Spoon the cream mixture in the centre of the pastry and scatter over the seeds of 2 passion fruit and the chopped pistachios.