We have food allergies as well. You need to contact special diets team at:
special.diets@disneyworld.com
They will give you the most recent special diets form. You need to have all your ADRs booked and submit the form up to 14 days ahead of your trip. A coordinator will call and ask if you want to speak to the chefs at each restaurant. You can even talk to Quick Service locations (ingredients change every year for the same item so always check the folders). The chefs are really kind but that a can still go south at high demand locations:
The waitress (Kathy) at CRT was extremely rude and refused to bring our pre order and kept forcing us to order from the menu. She talked down to us and kept repeating the menu (disturbing other guests near us; we were very calm and patient). There was a substitute Chef so some miscommunication and he later came to the table and apologized. We chose to enjoy our meal despite her. She eventually calmed down and even took pictures of us.
Similar thing happened at Space220. The Chef had our order but waitress refused to bring anything other than what was on the menu; I wrote a letter to the Chef that our order was not brought out (this was the second time this happened). Manager called me and initially started by saying we never checked in..long story short next trip we were seated by the Manager and she made sure everything was correct (no discounts or anything), but it was a good experience.
Stand your ground and speak to a Manager! Allergies are serious. I’m not sure if you heard of what happened at Raglan Road. The Patina group is not Disney owned (the operate Space220 as well) but Disney does train them on allergies.