Is there a particular area you'll be near? Disney Springs is a good option because there is so many restaurants there.
I really love the 4 Rivers food truck, it is just a food truck so it does not have the best atmosphere, but the food is amazing (get the taco cone). You can grab food from there, a margarita from the margarita stand and grab a seat by the pond for a nice relaxing outdoors meal.
The top level of Paddlefish is also a relaxing bar and you can order food from there as well, the view and the atmosphere can't be beat.
If you like fish and chips, cookes of dublin has a nice "pub" atmosphere and a bar so that you can have some Guinness pints with your meal.
There are many other places for a more casual and fast paced meal like D-Luxe, Blaze etc.