Separate the egg. Beat egg white and sugar until soft peak.
Add the egg yolk into the egg white, add milk and melted butter.
Mash the banana. add it into the mixture.
Add the flour and pinch salt.
Mix all together, at last put in the baking soda and mix it. Add some ground nuts if it is your wish.
Prepare a tin/bowl. Grease it with margarin/butter.
Pour the batter into it. Knock the tin to release some bubbles.
Prepare a steamer and place the tin/bowl into the steamer and steam it for 15 minutes.
Switch off the heat and let it rest for 2 minutes
Remove it out and let it cool down before unmolding it.
With the knife, slowly go around the rim of tin and mold the cake out.
