Once again, during my weekly produce run, I came across these purple sweet potatoes they had labeled as Yama. Most types of Japanese sweet potatoes are much less watery than the Western ones and their taste is often compared to that of chestnuts. They also vary in colour D yellow, orange, pink and even purple. The ones I purchased were purple on the outside and white on the inside. I decided to try to experiment with these over one weekend and decided to make home fries with them. They had a slightly sweet and nutty flavor and were absolutely incredible!