To make sponge:

1. Whisk eggs & sugar until thick.
2. Lightly stir in the flour.
3. Grease a cake tin.
4. Pour the mixture and bake at 200 C for 15/20 mts.

To make chocolate sauce:

1. Put water and sugar in a saucepan & dissolve sugar gradually on slow heat then boil syrup to 1/2 thred consistency.
2. Beat egg yolks till creamy.
3. Cool the syrup & pour over the beaten egg yolks.
4. Now cook in double boiler till it is thick. Add the cocoa powder & creamed butter..
5. Remove from double boiler & whisk till cool.
6. Cut cake in 3 layers.
7. Layer with sauce in between.
8. Garnish with walnuts and chocolate curls. Chill.