I know you didn't ask for a restaurant in the parks, and perhaps you've tried this, but we really enjoy the Plaza Restaurant in MK. A full service restaurant that serves primarily sandwiches, a soup, a salad + ice cream. Made to order food while you sit down and relax, and are served. Much better than any of the counter service burgers. This is the description:
Angus Chuck Cheeseburger - served on a flour-dusted kaiser roll with lettuce, tomato, and onion. Choose from the following toppings: Cheddar, American cheese, Bacon, Grilled Mushrooms and Grilled Onions $11.99
It comes with choice of fries, home made chips, or broccoli slaw (I request they switch this out for the German potato salad, which is a nice change). And, yes, you can get ALL of the above toppings added to the burger for $11.99. It's big.