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it probably says a lot to me that like. vader's relationship with food is used in masquerade almost like a barometer of, well... y'know that mechanic in shadowrunner where you if you've got a lot of cyborg bits, you're a shit shaman? like that, basically
if he's remembering his humanity, he's eating real food - humble food.
if he's in disguise - he's eating the local chow.
if he's giving up on his humanity - it's nutrition ration bars and fuckall else
(because why would a machine need to complain about its fuel? why should a machine care about it?)
and it's no coincidence that when leia snaps at him in the upcoming couple of chapters and twists the knife, then realizes how she fucked up by telling him that he is just a machine...
...she comes with food
to apologise, she comes with his favourite meal and notes how much she fucked up, but brings that as a peace offering