Preheat the oven to gas mark 6 or 200 degrees Celsius.
In a large bowl, mix together the eggs, light brown sugar and sunflower oil.
Gradually fold in the gluten free self-raising flour, oats, orange zest, orange juice and lactose-free yoghurt.
Place the mixture into a muffin cases in a baking tray then sprinkle with a little light brown sugar and oats.
Bake for 15-20 minutes or until golden.