Metro is right, the food sticky has some great info. However, from a personal point of view, these are some of our favourites...
Breakfast:
Cinnabon, City Walk
Croissant Moon, IOA
San Francisco Pastry Co, Universal
Lunch:
Panda Express or Emerils (they do a great lunch special), City Walk
Mythos or 3 Broomsticks, IOA
Lombards or Finnegans, Universal
Dinner:
Margaritaville or NBA City, City Walk
We don't tend to eat dinner in the parks - if they were open later, we would eat dinner and then go back to the parks later. However, Mythos, Lombards and Finnegans are all table service places so would be good dinner options also.