[Columbine]

I'm really annoyed at myself because I'm sure I've asked this before, but I ate this snack in Japan a couple of times and I can't for the life of me remember the name or find it online. It was a block (fairly sizeable, meant for sharing) of sweet potato an that had been dipped in a thin batter and then each side had been cooked on a teppan style griddle. Mostly it seemed to be sold from tiny street-side shops.