Helsinki

In the international departures area, just befor you go through the second check to the non-Schengen gates (so say gate 29), up a set of stairs but looking over the gate area below, there's a pleasant full service restaurant (which is relatively unusual in Finland overall). Usually quiet.

Prague

Once again up a level from the main area, between the two piers, right by the little outside spectators area.

It looks a bit like a school lunch canteen but has lots of interesting hot Czech dishes, the sort of thing I always find great when in transit. They take Euros. And the cashier spotted I had chosen (quite inadvertently) non-alcoholic beer and in quite adequate English sent me back for some "proper Czech" stuff !

SIN - 1 level above the check-in rows at Singapore Changi T2 has this conveyor belt sushi/japanese restaurant that has good food at reasonable prices. If something you like is not on the belt, one can order them with a click on the mouse and screen provided at every table.

I've decided to let this thread sink or swim on its' own merit, so it is now "un-sticky'd"

NCL
 

A bit off track but as pax in ncl we ate at a irish bar up on the first floor. lovely food good view of easy's fleet (haha) seriously tho the food was nice and it was all set out like a pub fake brick work on the outside and everything. not sure whether it's still there because they were building around it, but if it is try it.

BKK (Don Muang International)

after checking in and security check turn to the gates at the left side. after the last entrance to the gates there is a small bar where smoking is (was?) allowed. i think this is the only place at bangkok airport where smoking is allowed outside the smoking rooms. the food is ok, beer too. and you have a nice view to the runways and the military part of the airport.