1 medium unwaxed lemon, finely grated zest and juice (2 tablespoons juice)
1 small unwaxed lemon, finely grated zest and juice
2oz (50g) plus 1 level dessertspoon golden caster sugar
1陆oz (40g) golden caster sugar
1 level teaspoon cornflour
a little sifted icing sugar, to serve
1oz (25g) cold unsalted butter, cut into small cubes
3 large eggs
1 large egg