Peel the tomato and chop into cubes.
Heat the oil in a small frying pan, add the chopped tomato and fry over high heat for about 3 minutes
Create 2 gaps in the tomato and break the eggs into them. Season with salt and pepper.
Arrange pieces of tuna on top. Then sprinkle with dried oregano and optionally chilli flakes.
Fry for a further 3 minutes or until the egg whites are cooked. Serve with fresh parsley.
Replace tuna with feta or Gorgonzola cheese, for an extra carbohydrate boost serve with toasted bread or millet as a gluten-free option