I’ve never found porridge to be very good energy food – always felt hungry not long after before I was diabetic, and now I go hypo. I just tend to avoid it now, or supplement it with something else…
At the moment I am having serious issues with the good old DP, so any cereal is causing me problems at the moment!
I’ve never had problems with pizza myself, but I also don’t particularly like think crusts, so maybe that helps?