Sorry, but you can't tell me that crew don't have J meals. I've often seen the J FA walking down the back of the plane with a tray covered over with a tea-towel after the J and Y dinner meal service is complete: it happened just this Wednesday night again between BNE-CNS. Ok, I can't verify for sure they weren't J meals, but I'd be willing to bet they were. (Is the "staff catering" held in the front or rear galley on 738s?)
And when boarding, or perhaps just after boarding one time recently, I remember over-hearing the CSM say something to the effect "oh, did I get the {something to effect of meal preference} from [name of other FA]?" Yes, I interpreted this as the staff picking between the available J meals: or does the "staff catering" provide menu options for the staff?
Staff catering is supplied separate of pax meals and from what we have been told by FAs here, the selection they are afforded is often a superset of the pax menu. For example, a pax may get to choose from a hot chicken meal or a beef salad, whereas the FAs may choose from not only those two but some other dishes. The two sets of catering look identical to one another, i.e. if a FA selects the beef salad which also happens to be one of the selections for pax on a flight, then the appearance would be exactly the same (there would probably be just a label on the foil which says which meal is designated for who).
So it wouldn't be surprising if you saw a tea towel covering what appears to be the same crockery and the same tray and even the same food as that in J, because staff catering is served on the same tableware as J and often the food they can select from is a larger set which includes those choices offered to pax. If you "caught" a FA eating in the galley, your first impressions may be that they are just eating another J meal from a J tray. But the staff meals are catered in pretty much exactly the same style as J pax meals; they are separately filled orders which are not meant to intermingle.
And the first time I got a J points-upgrade, and ok I'll admit it was a few years ago, I was keen to try out the J service to its fullest
, so asked for a second meal. The FA's reaction was such that you could tell they flinched a bit (which in hindsight I took as "they're our meals, darling") and returned with a Y meal. Soon after, I watched the FA walk down the back with a tray of meals covered with a tea towel. Once again, I'd be happy to put money that they were J meals.
There might be "staff catering", but you can't tell me that this doesn't happen: even if it's not all the time, at least some times.
I'd probably be a little bit taken aback if you asked for a second meal, especially if you successfully ate up the first one, as it's just not normal, unless you were a rugby player or John Pinette (at least from a few years ago). (Yes, I like to try premium class at its fullest, too, but I only stick to one meal even in F....then after that snacks or light bites if I really want or need it).
Ideally (and I do use this word carefully), if there was staff catering then there should be no reaction interpreted as "they're our meals", because (a) staff catering ensures the FAs will have meals, (b) barring cattiness between FAs, they will get the choice they ordered, and (c) it is probably prohibited to serve a pax a staff meal.
Given that there are only 2 galleys on a 738 (with the aft galley probably bigger than the forward one), but with 12 pax to feed in J compared to over 150 in Y, I wouldn't be surprised if they put all the J and crew meals in the forward galley. Probably makes it easier for the caterers as well since all the meals in the trolley would be the same stock unit essentially.
Now I'm not saying there aren't dishonest FAs and/or CSMs out there who break the rules and, perhaps, "swap out" or "deprive" pax of meals which they can select from in order to satisfy (no pun intended) their own greedy satiety. But I can vouch that it is possible to legitimately miss out on a meal, even in premium class (hopefully never in First Class!), and it's not fair to always accuse the crew of stealing meals, even if it looks to be that way at first sight, because it just may be legitimate that one preference of meal was more popular than the other(s), and, short of wastefully (except perhaps in F) stocking up enough meals to make sure anyone can have anything they want, there is and will always be a risk that someone is going to miss out on their preference.
And yes, I can say that I have been in a situation where I have missed out on my preference of meal, more than once.