They have a chicken caesar salad...although I know the dressings can be bad. Maybe if you order it on the side. Also there was a great sandwich that I got on homemade bread that was really good (different from burgers). There is one qs at dinnertime that offers more homecooked meals such as grilled chicken, pork chops, stirfry, rice, and salmon (I know you don't like seafood, but I saw it there).
For breakfast I did see yogurt and fresh fruit, plus cereals. (We took oatmeal and cooked it in our room with water from the coffee pot, saved money and healthy).
If you check out allears.net they have actual menus for each resort and restaurant within the world and you can decide before you go what may be the best options for dieting.
Also if you get a pedometer you can monitor your many footsteps at WDW, and then use it to determine how many calories you have burned in order to help you keep your weight loss goals! Good luck!!!