I'm not sure if you are open to sharing or kids meals. A few suggestions I have:
Magic Kingdom
Columbia Harbor House, shrimp platter, DH and Ishare
Pecos Bills, the kids meal is a great deal. They are very generous with the french fries, and you can take your burger to the fixens bar. A great value IMHO
Tavern Torgua, tacos, etc
Epcot
Mexico counter service. Nachos are huge, DH and I share
France, the ham and cheese croissant is huge
Norway, get a sandwich and pastry to share
DHS, not a lot of choices here IMO.Sorry I can't help you out
AK Yak & Yeti, the chicken fried rice is huge and very inexpensive.
I would be looking at allears.net for pricing and menus, but I would be looking into a lot of kids meals. Not the ones with the usual chicken nuggets, but different choices which can be quite good. You also get a beverage with those.
Water of course is free
Good luck
