If you go to the back of the magazine, you'll see the service schedule for all flights http://morningcalm.koreanair.com/.

On redeyes from SE Asia, the meal option is "a meal." I don't want to say breakfast because the economy options have never been breakfast. Not sure what's up front. In the back, it's always "noodles, chicken or rice porridge."

You can pick when you eat. Even in Economy, if you are asleep, they put a sticker on your seat that says to let them know when you are hungry.