Originally Posted by
sdsearch
What you might want to look into is whether there is any way to warm it up at the airport before you board. Then it would equivalent to carrying on a hot meal you buy at the airport.
Also, look into ways of wrapping the food container for the maximum time to maintain heat, after heating (ie, it's wrapping which would be kept separate through security and only wrapped after the food was heated at the airport).
I was going to suggest perhaps finding a microwave in a lounge prior to the flight.