Le Cellier is really good as is the Rose & Crown try the fish and chips there or I believe they have a vendor for that in the UK as well.
The American Adventure serves hot dogs, chicken fingers, root beer floats, French fries and the like. The food is not bad and it can be pleasant to sit outside under the trees, especially when there is a concert going on. There is plenty of seating.
China has great counter service for a quick bite wonton soup, egg rolls and the like. The food is pretty good.
Germany has great soft pretzels! I am not a fan of the food served at the Biergarten, but many folks love it.
Also, the Coral Reef has some excellent seafood. It is very pricey, however.
Ive eaten at Mexicos larger restaurant, but never at the counter service along the lake. I love Mexican food, so Im sure Id love that as well. I seldom hear negative comments.