Preheat oven to 180°C.
Grease and line a 7" round cake tin.
In a bowl mix together flour, sugar, baking powder, salt and baking soda.
Add the curd, oil, milk and vanilla in the centre.
Mix it to form a smooth batter.
Pour it into the prepared cake tin.
Bake for 30-40 minutes or until a tooth pick inserted comes out clean.
Rest it on the wire rack for 10 minutes.
Flip on the wire rack, remove tin and the paper.
Cool it completely before wrapping in cling wrap.
Refrigerate until assembling.