150g/5oz plain flour
4 tbsp caster sugar
60g/2¼oz pistachios, coarsely chopped
pinch salt
1 vanilla pod, seeds only
100g/3½oz plain chocolate, minimum 75 per cent cocoa solids
100g/3½oz white chocolate
100g/3½oz butter, plus extra for greasing
4 free-range eggs
4 free-range egg yolks
300g/10½oz mascarpone
2 tbsp Marsala wine