Ash banana

Ash Bananas are long, gray fruits grown in the Fire Nation, specifically on Hing Wa Island. Despite their resemblance to the conventional banana, the fruit is actually closely related to the yam. It is often baked into a tasty, fruity bread.

Although the sizes of the fruit would typically seem those of a banana, a more logical approach would suggest that it is much smaller, since the merchant only sends out one worker to fetch an entire supply.