score:5
A list of what can you expect below. Specific comments on Lufthansa and Emirates only, I haven't flown the others this year.
Upvote:5
AirlineMeals.net might fit the bill: it's a giant repository of photos of airline food, so you see exactly what was served and can form your own opinions: http://www.airlinemeals.net
For example, if you search for "Lufthansa dxb", it shows you meals for their flights to/from Dubai.