Hi, Melanie!
There are so many great restaurants to choose from!  Here are some of my family's favorites:
-Tusker House breakfast buffet with your host Donald Duck at Animal Kingdom
-Crystal Palace buffet with Pooh and Pals.  I like any meal here, but try lunch or dinner
-Cape May Cafe breakfast buffet with Goofy at the Beach Club Resort
-Chef Mickey's at the Contemporary (dinner is the best option)
-Sci-Fi DIne-In Theater or 50's Prime Time Cafe at Hollywood Studios (I suggest lunch)
-Akershus Royal Banquet Hall in Epcot serves a delicious family style breakfast.  Your lovely hostesses are none other than Disney Princesses! 
Wherever you decide, make sure to make your 
Advance Dining Reservations.  
I hope this will give you some ideas!  If you need more suggestions or a plan for your vacation, let us know. We are happy to help!