Preheat oven to 175°C fan.

Grease an oven proof dish and set aside.

Separate the egg yolks from egg whites.

In a bowl add the egg whites and mix welp with an electric mixer until it doubles in volume.

Add the erythritol and continue mixing until it's all dissolved and it forms stiff peaks.

In a separate bowl mix the egg yolks with vanilla essence.

Add the egg yolks on top of the egg whites and mix for another minute.

Add the melted coconut oil and mix for a few more seconds until well incorporated.

Sprinkle the flour and incorporate slowly with a spatula.

Pour the mixture into the greased pan and bake for 25 min.

Leave it to cool completely before cutting it in half.