Prepare all ingredients.
Wash your lemon. Grate the zest then press the juice.
In a bowl, mix the plain yoghurt,...
flour, lemon juice, zests,...
...and finally the egg yolks.
Beat the egg whites firm.
Add the icing sugar at the end of beating stage.
Add the firm whites to the mixture.
Fill to 2/3 high in ramekins that were previousely buttered.
Bake in hot oven, 180°C...
...and leave to cook 15 to 20 minutes.
When finished, sprinkle the surface using icing sugar. Serve immediately.