I didn’t like my porridge but my mummy made me eat it,
So while she wasn’t looking, I gave it to my (can’t remember who. Various pets including a parrot who don’t like it either, child eventually throws it on the fire)
It hissed and fizzed and sizzled, like porridge will when burning
(Mum comes back and sees porridge all gone)
You ate that quickly, faster than I ever saw
So while I wasn’t looking she dished me up some more
It was in a book of poems I had from M&S when I was a child, I’d love to fill in the blanks.