At MK - Cosmic Ray's, there you will find huge portions of their entress (adults at least). The chicken and rib combo meal is huge!! The cheesesteak sandwich is also huge. No way I could eat that sandwich, fries and the dessert by myself.
Also at MK is Pecos Bills. Here you will find a wonderful taco salad that you can make as big as you wish.
Both these restaurants have a toppings bar. Things like veggies, tomato, lettuce, onion, peppers, mushrooms, cheese....anything you want on a burger/hotdog and more. You can add anything from the toppings bar to whatever you buy. Fabulous perk!!
At Epcot we like Sunshine Seasons. It is the food court in the Land Pavillion. There is plenty of variety from Asian, salads, soups, sandwichs, porkchops and the desserts....oh my. You can also refill your soda here.
DHS has Starring Rolls. Here they have sandwiches that are so big that even the biggest eater can't finish with the sides. Also you can get one of their gigantic cupcakes as your dessert.
Finally AK, here we eat at Restaurantosaurus. They have the best burger IMO. A bacon cheeseburger and a toppings bar as well.
This place is also inside, so you have air conditioning if it is too hot.
Oh don't forget DTD, here you will find 2 of the best CS places.
Wolfgang Puck's Express...dishes like pizza, spaghetti and meatballs and creme brulee are on the menu. You order like CS, but they bring the food and refills of soda to your table. Very cool.
The second place is Earl of Sandwich. Mmm, all kinds of hot sandwiches.
Both of these restaurants are in the marketplace end of DTD.
Enjoy eating and your trip!!