I eat wild edibles daily, but the most interesting and satisfying I've found thus far has been "chinese yam", "cinnamon vine", or "air potato". I ran up on this innawoods around Sept 2017 and just thought "that definitely looks like some good shit to eat". I gathered samples, including a leaf, and upon arriving back at camp (my home), began searching for identification.
Out of 10 books I have that cover either wild edibles specifically, or at least plant identification, it was a no show. I then started Googling various potential strings including leaf shape when I finally ran up on the magic combination. Turned out they were native to Asia and apparently not widespread enough to make it into the US plant books. I've never found any others myself in any but this particular spot.
I wound up going back and forth for as long as they were there and gathering/eating several bags full of them, repeating in 2018, and each time I gather I leave plenty behind to continue their cycle. They do indeed taste like mini potatoes!