How to cook
Beat the eggs with the sugar to a fluffy cream in a bowl. Add half the flour and stir carefully. Add the remaining flour and water.
Lay out a 9″ (23 cm) x 13″ (33 cm) tray with baking paper. Pour in the mixture and bake the layer at 356°F (180 °C) for 25 min. Beat the cream until fluffy.
Add the yoghurt and stir carefully. Take the layer out of the oven and wrap it into a roll along with the baking paper on top of a moist towel.
Mix them and sprinkle on top of the roll. Roll it back up into a tight roll. Decorate with powdered sugar (optional).