1 unwaxed lemon, zest only
2 lemons, juice only
1-2 tbsp lemon juice
100²µ/3½´Ç³ú plain flour
1 tsp baking powder
½ tsp bicarbonate of soda
8 green cardamom pods, seeds removed and ground (to make 1 tsp ground cardamom)
125²µ/4½´Ç³ú caster sugar
120²µ/4¼´Ç³ú caster sugar
30g/1oz ground almonds, sifted
75²µ/2½´Ç³ú icing sugar
100²µ/3½´Ç³ú shelled pistachios, plus extra to decorate
pinch salt
125ml/4fl oz sunflower oil, plus extra for greasing
1 tsp vanilla bean paste
2 large free-range eggs
50²µ/1¾´Ç³ú soured cream