[...Okay, no, that doesn't happen. It's more that he raises his eyebrows lightly (almost as if this hadn't occured to him indeed. but clearly that can't be it; that'd just be silly), before resuming the look of faint disdain.]
I assure you I am quite aware. [But he's so bored, you see.] Shall I make a note to henceforth turn you down, should you ask for it, then?
Regardless, there is no sense in throwing away perfectly good food when it has already been made.