You can google and probably find some different menus online (check the Disney Blog). Pretty much everything for breakfast - omelets, eggs benedict, waffles, pancakes, fruit, cereal; sandwiches and salads for lunch; for dinner - Chicken, steak, seafood, pasta, soups, salads, appetizers, vegetarian, gluten free... There is also a buffet. Near the pool there are hotdogs and hamburgers, wraps and salads, soft serve ice cream, pizza, Shawarma (on the Magic, at least); chicken fingers (on Fantasy and Dream). And room service- sandwiches, cheese platters, chicken wings, continental breakfast, etc. That is the free stuff.
There is also candy, popcorn, fancier Italian food at Palo - all for a fee; and really fancy french food at Remy on Fantasy and Dream for a bigger fee! And now you can get fancier ice cream and Gelato for a fee, on the Fantasy and maybe the Dream (I think)?- all for a fee.