1. Preheat the oven to 200°C. Briefly whisk the eggs with the oil and yogurt.

2. Stir in the sparkling water, then mix in the baking powder.

3. Add the crumbled cheese and stir.

4. Loosely roll up the 6 filo sheets and cut into strips a finger wide.

5. Add the strips to the cheese mixture and mix thoroughly.

6. Butter and flour a muffin tin, or put a paper case in each hole.

7. Divide the mixture between the holes. Bake on the middle shelf of the preheated 200°C oven, using top and bottom heat, for 30 minutes. A fan setting may be used.