Process:
First beat the sunflower with the sugar really well.
In a separate bowl beat the eggs really well. Once beaten add to the sunflower and sugar and beat them all together.
Add the juice and zest from the orange to the mixture and stir.
Add the flour and baking powder and stir again.
Empty the mixture in a baking dish. Put a baking sheet in the baking dish or add some sunflower oil to the bottom and sides of the dish in the case you will not use a baking sheet.
Preheat the oven (fan) at 180 degrees Celsius.
Bake for 45 minutes.
Enjoy!