I know this is an odd topic, but having read the UA forum's food topics, I'm somewhat shocked.
Then when I thought about it, these days, it's not easy finding hot food on shortish flights (<2hr).
Which carriers offer hot food on these type of flights? You'll have to excuse me, I was brought up on a lot of domestic flying on Ansett, where we would get a full hot lunch on a 45 min flight
Cheers,
Justin