10 large lemons, zest and juice only
250g/9oz plain flour, plus extra for dusting
550g/1lb 4oz caster sugar
25g/1oz icing sugar, plus extra for dusting
1 pinch salt
100g/3陆oz cold butter, plus extra for greasing
500g/1lb 2oz cr猫me fra卯che, to serve
700ml/1录 pint double cream
1 free-range egg
14 free-range eggs, plus 1 beaten egg for glazing