This is a very, very easy one. Hope you enjoy it.
Buzz a full orange (including peel) in the food processor until it's all mooshed up (notice the technical terms l am using).
Combine 3 beaten eggs with 185 gr of melted butter, the mooshed up orange, 1 cup of castor sugar and 1 1/ 2 cups of Self Raising flour.
Bake for 50 minutes in a moderate oven.
Yummy served with whipped cream.