Preheat oven to 180°C, then grease and dust with flour a 24cm fluted ring pan.
Beat with an electric mixer the butter, the lemon rind and the sugar until light and fluffy.
Add eggs, one at a time, beating well after each addition.
Add half the yoghurt and half the lemon juice and mix well to combine. Sift in half the flour with potato starch and baking powder and stir to combine.
Repeat with the remaining yoghurt, lemon juice and flours.
Scrape the batter into the greased pan.
Bake the cake for 50 minutes or until a skewer inserted in cake comes out clean.
Cool in the pan for 10 minutes, then turn out onto a wire rack over a baking tray.
Meanwhile, make the lemon syrup. Combine the lemon juice, the sugar and the cold water in a saucepan over low heat, add the finely sliced lemon rind. Stir until the sugar has dissolved and bring to the boil, then let it simmer until thickened.
Pour the hot syrup over hot cake and top with the lemon zest.
Tried this recipe?We love to see your creations! Snap a pic and tag @julskitchen and hashtag it #myseasonaltable!