Prep. time: 10 minutes
Baking time: 25 minutes

1. With a whisk, beat the whole egg and 5 egg yolks with the sugar until the mixture is light and pale; 
2. gently fold in the sifted flour; 
3. beat the 5 egg whites to stiff peaks and fold them gently into the egg yolk-sugar mixture; 
4. oil or butter a lamb-shaped cake mold; pour in the batter; bake in a preheated 180°C. (350°F.) oven for about 25 minutes. The cake is done when a skewer inserted into the center comes out clean; it should be nicely risen and golden.
5. Turn off the oven; open the door and let the cake cool gently in the pan for 5 minutes. 
6. Turn out of the pan gently, because it is very fragile. 
7. Sprinkle with icing sugar (as in Alsace) or glaze by pouring some melted good-quality chocolate over the cake (as in Germany).