The Wonders of Teochew Porridge

At the dinner table tonight, my dad broke the silence by saying:
Father: "Not too long ago, I went to eat Teochew Porridge at the hawker centre. (Paused)
Father: "I said to the tauke : 1 pork porridge please, minus the porridge and egg"
To our horror, we stared at dad blankly. It took a while to register into our minds and we roared into laughter.
Me: "So what is the outcome of pork porridge minus the porridge and egg?"
Father: "Meaty soup"
and he grinned widely. :)