Eating @ HongKong Airport

There are two airports in HK.
One is the main airport where one checks in and disembarks if one is going into HK. The other is the transit airport where one gets off the plane and waits if one is transiting.

The main airport is huge and has a number of eateries. If you are going via HK and have more than a few hours at hand, just go to the main airport, finish immigration and just wait out there. You might get lost in the huge airport but would certainly not get bored and you would have more than enough options to choose from when it comes to pleasing your taste buds. Note that visa is mostly on arrival in HK and you may not need a prior visa to clear immigration and wait out in this airport.

The transit airport is relatively small. Has but one food court with a handful of eateries and is not the best place to wait - especially when you are transiting.