I just sliced and cut nagaimo 長芋 into small match sticks. I dressed with a small amount of sushi vinegar (from the bottle) and placed in the middle of the dish. I placed California gold uni with a small dab of real wasabi. On the three corners, I paced nori strips.
Before eating, we poured a small amount of soy sauce and mixed. This is certainly a good small dish. A perfect Izakaya affair which goes well with cold sake even with Daiginjou 大吟醸.