Grease and line your baking tin with parchment paper. Preheat oven to 180 degrees.
In a bowl, mix the curd and granulated sugar till sugar dissolves completely. Add the baking powder and baking soda and leave the mixture for 3 to 4 minutes for the bubbles to form.
Once the mixture has frothed well, add the oil, vanilla, orange and lemon rind and the flour and mix well.
Pour into the tin and place into the oven.
Bake for 20 minutes or until a skewer inserted into the center emerges clean.
Remove from the oven and let cool in the pan for ten minutes. Now remove and cool it on a wire rack.
Serve it in any way you wish.
Sadly, all pictures were lost