Secret Recipe

Mum used to make me a special breakfast concoction when I was small.  She said it was good for me and would make me strong and healthy but I hated it.  I would roll it in my mouth from side to side before swallowing it.  It usually took a whole morning before I finished the stuff.  It was a test of patience for both Mum and my amah.  And what's the secret recipe?  Raw egg beaten into a glass of milk.