I usually order "Hindu vegetarian" when travelling, because one can then mix and match the meat entree of choice from the other "standard" meals, if required. (In Business Class, they will always have spare meals, right?) If nothing else, a few cold cuts go very well with "Hindu veg".
I have been doing this for about 30 years now. Off and on, I change the preference to sea-food, but only for the flights out of Europe.
In the old days, I would observe that "Hindu veg" would be ordered mainly by Indians, seldom anybody else.
Now I have, of late, observed that "Hindu veg" seems to be the option more than a few non-Indian people select, for flights to/from India, and often even when flight sectors are on non-India routes. When I asked an airline caterer in India, he said, yes, this does sem to be a trend, though he did not have any data.
Anybody have any inputs on this?
(FYI/G, a "Hindu veg" meal has no religious connotations, just simply means no meat/fish/egg, two veg, one lentil, rice/pilaf and rotis, with some salad/papad/pickle, usually mildly spiced but with additional masalas/spices available)