1 lemon, zest only
397g tin condensed milk
250g/9oz plain flour
1 tsp almond extract oil, for greasing
4 cardamom pods
250g/9oz caster sugar
1 tbsp icing sugar
chopped pistachios (optional, see Recipe Tips)
1 tsp vanilla extract
600ml/20fl oz double cream
8 medium eggs
100ml/3陆oz full-fat milk