Hi!
Where i work, getting your 20 minute break or whatever it is, is just an expected thing. Although, obviously on short sectors when there's no time, you try and get something to eat when you can, but you should definately be getting breaks no matter whether you work on the ground or in the air! Definately look into it. On longer sectors (where i work anyway) it is up to the Onboard Manager and the Second Senior to organise crew breaks for their respective crew.
Oz