You can ask (not a faux pas), but it will depend upon how many meals there are (most catering is one per passenger). There are several posts on FT about "stinky" food (which is always in the eye of the beholder) being brought onboard. I would stick with blander, less aromatic foods. I am reminded, years ago, of a Delta Owly Bird from ATL to LAX on an early 747; eleven passengers and fourteen FAs. We were told to eat as many sandwiches (the only choice) as we wanted since they would be thrown away when we landed.