Re: Nobody NEEDS a connected kettle...
"[...] adverts on to bread [...]"
Given the souvenirs the faithful buy for the Pope's visits then his Holiness's image on toast would be a sure fire winner. Even one of Jesus Christ himself would find a marketing niche. Transubstantiation could be made more visible.
For Satanists you could judge the heat to the point where there was real smoke or even flames in their preferred image's outline.