1 drop lemon juice – do not be tempted to use more than this or the egg whites will become too stiff
185²µ/6½´Ç³ú caster sugar
185²µ/6½´Ç³ú ground almonds
185²µ/6½´Ç³ú icing sugar, sifted
60g/2½oz unsweetened chocolate, ideally 100% cocoa solids
100g/4oz dark chocolate, or white chocolate if you wish
2 medium free-range egg whites
100ml/4fl oz whipping cream