I want to introduce a new restaurant every time I make a new post, but you can have different meals at the same restaurant if you visit it in a different season. I introduced the restaurant called COCO'S before, and my city has many of it, but my favorite has been always Denny's.
And the name of this dessert was "Rolled Mocchiri Purple Sweet Potatoe". It was basically sweet potato wrapped in thin sheets that were made of rice cake. The meaning of the "Mocchiri" is "soft and elastic". It is like a variant of Mochi, which means rice cake.
The Japanese Denny's is one of a few family restaurants where you can have very good desserts. It's autumn after all, so why not try some fruits that you can have only now?