Anyway, he was just by himself; how fancy did he expect his meals to be? Did he really think wealthy people feasted on delicacies from land and sea every day?
In reality, it wasn't much different from ordinary people, except maybe the ingredients were more refined, and there was a bit more freedom in what they ate; they could have whatever they wanted without worrying about the cost.
But their everyday life was much the same as anyone else's. They didn't eat Australian lobster and abalone as staples; they still needed a balance of meat and vegetables, and they still ate rice.
Chu Tian didn't have anyone to feed but himself, so he was even less fussy.
For busy stars, eating boxed lunches is a common occurrence. At most, a top star might have a special dish cooked for them.