COURGETTE AND YUZU CAKE

200ml sunflower oil • 200g golden caster sugar • 4 large eggs • 2 tbsp yuzu juice • 250g self-raising flou • 1 tsp bicarbonate of soda • 250g courgette (about 1 large), grated | Icing • 340g soft cheese • 85g icing sugar • 1 tbsp yuzu juice