There are some basics with airline food. For example anything that relies on frying, searing or grilling is likely not to taste anywhere near as good as it might do on the ground. Hence the awful "potato wedges" that VS have sometimes ill advisedly served up, and the varying quality of meats.
The best dishes are those that have enough liquid or sauce to ensure that they don't dry out, hence the popularity of curries, stews and so on. The pies pretty much fall into this bracket too. And of course a decent cold salad should always be possible.
So, with that in mind I'd like to see:
Sushi (easily stored and served, but it had better be decent quality)
Indian food (rice is generally OK on a plane)
Thai food (and a tom yum goong would be a nice alternative soup)
More innovative salads which can be served with either meat, fish or on their own (VS used to do this in the good old days of UC food)
On our F SQ flights earlier in the year I had some decent sushi and a truly great dish of Peranakan Chicken which easily surpassed most restaurant food. Surely "Book the Cook" service like SQ (which is available in both J and F) would be within the bounds of possibility?
Oh, and more attention paid to the wines too, please. Get rid of that repulsive alleged champagne. Instead stock
Petaluma Croser as a nod to the LHR-SYD route. And the white wine selection should always include at least one big Marlborough Sauvignon Blanc, a decent, heavy oaked Chardonnay, and of course something a tad lighter like a Pino Gris even though these don't fly as well.
And ferchrissakes get us some decent beer. Fuller's is just down the road from LHR in Chiswick and I'd be happy with some Pride, ESB or Golden Pride.
BC