While the cake is baking, combine the finely grated zest of a lemon with 100ml lemon juice and 50g golden caster sugar in a small pan, bring to a simmer and allow to bubble for 5 minutes, then set aside.
Ngenkathi ikhekhe libhaka, hlanganisa i-zest kalamula egudlwe yaba ncane kakhulu namanzi kalamula angu-100ml ne-golden caster sugar engu-50g ebhodweni elincane, yibilise ibilele phansi bese uyivumela yenze amagwebu imizuzu emihlanu, bese uyibeka eceleni.