Howdy Kimi!
The chefs at Walt Disney World have taken great care in providing menus that cater to almost everyone. From the pickiest of eaters to those with food allergies.
I have a few recommendations of locations that have a variety of options.
Magic Kingdom:
Cosmic Ray's Starlight Café
Epcot:
Sunshine Seasons
Disney's Hollywood Studios:
Sunset Boulevard
Disney's Animal Kingdom:
Restaurantosaurus
You will find oodles of options at the Character Buffets as well.
It will take you some time but I think the best suggestion I can give you would be to spend some time on the
dining page of the Walt Disney World website. When you know your basic itinerary of where you will be each day, take a look through the various restaurants at the theme parks, water parks, resort hotels and/or Downtown Disney. You will find menus for most of the restaurants. Review some of the menus so you can identify potential restaurants.
Talk to the Cast Members when you are at the restaurants as well as they might be able to create something that she will love.
Thanks so much for your question and please let me know if you need any further information as you plan your vacation. Have a magical day!