Depends on what you want. At IOA...The burger place at Jurassic Park is decent, pizzas pretty good at fantastic 4 cafe, the restaurant in Toon Lagoon serves multiple things...and there's a good sandwich shop just up the way from there called Blondies.
At Uni...Louie's is great for pizza or pasta, Monsters cafe has a few different things including a variety of hot dogs and pretty good lasagna, Mel's and Richter are the places for burgers.