So, while traveling in Japan, I found that a lot of European-style bakeries have a dish that's essentially a baked potato inside of a bun. Like, it's a small potato wrapped in bread dough which is pinched closed over top of it, with bacon, green onion, and cheese on top. Now that I'm home, I'd like to recreate it. For the life of me, however, I can't find any kind of recipe. Since I don't remember what it was called, I'm stuck rehashing fairly generic Google searches for "baked potato in bun with cheese" or the like. What is this dish called?