Beagle - having only flown on the Victor, your tales of the culinary delights available on later tankers fill me with envy.
There was, in fact, provision for hot food on the Victor in the form of a can heater. A can of soup inserted in this device shorly after engine start would, with any luck, be luke warm by the time you reached top of descent after a longish sortie. Thus the device was carried around as a useless (and unused) bit of extra payload for the lifetime of the aircraft!