Hands down my favorite American Chinese food is Hot and Sour soup. That being said, I find it incredibly difficult to find good hot and sour soup. The only place even close to local to me where I will order is a 35 minute drive adn deserves its own digression
If you're ever traveling through Florida via I-75 the first major town you'll come to is Lake City. Do yourself a favor and get off of the highway and check out "Fu King Chinese." Its amazing. My family has been eating there since before I was born (so more than 33 years currently) and the food is delicious. They have, hands down, the best Hot and Sour soup I've ever tasted. Balanced heat, sour with depth of flavor (as opposed to pour white vinegar), and a velvety gem-clear stock. Super tasty. Their West Lake Style Duck is another highlight of the menu.
The best food I've had that may be authentic is the Sticky Rice at my local Dim Sum restaurant. Super good and served in some sort of banana, bamboo, or palm leaf.