25g/1oz dried cranberries
2 oranges, finely grated zest only
150²µ/5½´Ç³ú plain flour, plus extra for dusting
100²µ/3½´Ç³ú caster sugar
50²µ/1¾´Ç³ú cornflour
50²µ/1¾´Ç³ú ground almonds
40g/1½oz slivered pistachios or pistachios
150²µ/5½´Ç³ú white chocolate, cut into chunks
115g/4oz unsalted butter
1 small free-range egg, beaten