My 12 year old is autistic and also has very defined food preferences and aversions. He doesn't eat meat of any kind, mostly because of sensory issues w/ it...but will eat his weight in broccoli, corn, peas, or cauliflower!
I scour the menus looking for pasta, pizza (not flatbread), grilled cheese, & quesadillas... you would be surprised how few menus have at least one of these items on them. FWIW, not one CS in MK has any of these outside of BOG, which is really a hybrid CS/TS and difficult to walk up to. On our two MK days we are opting for the Plaza so he can have grilled cheese.
My family just doesn't eat at many of the popular restaurants because of their limited offerings. No Ohana, Hoop De Doo, Skipper Canteen, Satu’li Canteen, etc and many times our TS meals are mixtures of different locations so the adults aren't restricted in their choices. When he was younger we opted for buffets so the adults could have a wider choice and there was always pasta somewhere...but at 12yo we are now paying adult dinner charges and I can't bring myself to pay $40+ for a plate of pasta for him.
Personally, I would love it if every restaurant would be required to have at least one of those four things. Some posts here are complaining about chicken nuggets and burgers everywhere...and neither choice helps us at all. It really isn't hard to make sure you have some kind of plain pasta available.
Thankfully, breakfast isn't too much of an issue because ds is a huge fan of pancakes and waffles