I did not realize that there were five lobes inside each urchin - I
looked this up because all the uni in the package I bought were at least
connected to one other lobe. Most still have milt or roe in them. I
was wondering if one should remove that and there is also a tendril that
connects the lobes that I have removed from the ones I've made so far
because it is dark colored and ruins the presentation. Do you really
have to rinse the uni before preparing it? That sounds to me like
washing mushrooms - you'll lose a lot of flavor. The way I've fixed
them so far is to cut a thin piece of Japanese cucumber put a tiny dab
of wasabi on it, put one uni lobe on top of that, garnish the top with
some thinly sliced negi, and put a drop of shoyu on top of that.