Last time disney dining just told me that I could ask at any counter service restaurant for an ingredient list, but the reality was that only the pretzel cart CM gave me one.
That's really shocking. They do have the binders, I've seen them! I've perused them at the candy/treats corner in Critter Country, and I've looked at it at Pacific Wharf Cafe, I believe.
As someone said, vegetarian means no meat. Sometimes people will use it as shorthand, but will also eat fish. But Disney doesn't seem to define it as including fish.
Vegan is much more serious. You're not even eating honey if you're vegan.
The chef I talked to that day had just made a *raw* lasagna type of dish for a man who eats a raw diet...he was very proud that he was able to do that! (it was at napa rose of course, but they want to help everyone)
I did run into issues at the Trattoria, but it was b/c of that celebration cake which is made off at the bakery, not by anyone there IN the park itself. That was kind of a pain, but hopefully our experience (and we didn't order it) made them realize that they need the ingredient list there with them.
(we're vegetarian, but there's also a need by the guys in my family to avoid anything based on corn syrup. there's a lot out there based on corn syrup! so there's a lot we avoid at the parks, sigh, and we wouldnt' be able to eat much of anything if they didn't make ingredient lists available to us!)