Anything sweet potato
Literally came in this thread to say this....so many brands out right now. Sweet potatoes are supposedly really hot in Europe right now too. When I was back home in Eastern North Carolina, the sweet potato farmers would let people go out to their fields and pick up the residual sweet potatoes that weren't harvested by the machines. I was out there picking up extra sweet potatoes back in 2011. Next year I was in Houston, and they told me that the farmers don't allow it, and I heard they building a big factory out there for dog food, made from sweet potatoes (I guess it's supposed to be healthier for pets).
Should have tried to get in the game if I had known it was going to be as big as it has become.