So! Does porridge also go with you on-tour? If so, in what form?
As for me here in the States, I take some small packets of Quaker Instant Oatmeal (flavored, typically my favorite of Maple & Brown Sugar...so sez the packet). Just add boiling water, wait a bit, stir, and there's your porridge. Mix up the powdered milk, and you're good to go!
Dan.