For breakfast, most of the resort food courts have a breakfast "platter," that looked pretty big. Even the pancakes looked like a pretty big serving.
It's not exactly a big meal, but you can get 2 items and a beverage at the Main Street Bakery in the MK. They have muffins, pastries, donuts and even breakfast sandwiches with eggs and meat. The only restriction was only one "savory" item allowed. So you could get 1 savory + 1 sweet or 2 sweets. For your beverage, you could get the usual milk, juice, soft drinks and I think coffee.