Okay, I'll bite - If the actual requirement is to eat warm hotdogs on board, could the OP not simply bring an appropriately sized empty thermos through security?
This could then be filled with boiling water (And hotdogs, depending on if cooking time is an issue) by either any restaurant in terminal or potentially lounge attendant, or indeed perhaps on board the aircraft by the crew?
In goes the hotdogs to the hot water, screw the top on, 30 minutes later you have warm hotdogs, no? You'd be limited by thermal mass and the number of hotdogs you wanted to eat if filled in the terminal but, assuming that the crew are willing to refill you would essentially have no limit.
This removes the requirement to cook anything or have any warmer/warming device, and I am pretty sure you're allowed to ask for boiling water on an airplane.