"Of course not, just tell me whenever you want food." As far as he knows, she just appeared in his world right before she noticeably-didn't-appear in his window.

"Speaking of food constraints, can sorcery make a substance given a description of it? There's a metal which, if it existed in the right alloy, could effectively remove my need to eat. Unfortunately it can't do the same for anyone who isn't me without seriously harming someone else."