Back when I posted my recipe for Grilled King Oyster Mushrooms, Shohga suggested grilling the mushrooms brushed with ponzu and then using them in sushi. I thought that sounded like a great idea, so I filed it away in my brain to try later. The other day I went on the hunt for some ponzu, but couldn't find any without bonito (a type of fish). So, I decided to use some mirin instead. Since my grill was out of propane, I tossed the shrooms into a pan over medium heat and kept splashing them with mirin until cooked. I put them in the sushi roll with some chopped bok choy that I briefly pan fried in a little light soy sauce. The shrooms were slightly sweet and the bok choy added a light crunch. Dipped in some soy and wasabi, it was some mighty good sushi.