3 lemons, finely grated zest and juice
250g/9oz raspberries
175g/6oz plain flour, plus extra for dusting
150驳/5陆辞锄 caster sugar
1 tbsp icing sugar, plus extra for dusting
75g/2陆oz cold butter, cubed
pouring cream (optional)
600ml/20fl oz double cream
1 free-range egg, beaten