Simply assembled hiramasa (amberjack) with napa cabbage and shimeji mushrooms taste so pure and satisfying with the rich flavor of the dashi broth. The broth’s umami level is boosted with the addition of ayu fish sauce (I call this “magic essence”).  Hiramasa can be substituted with yellowtail, sea bass, snapper, salmon, or any buttery fish filet. I like to serve this dish with plain donabe rice (white or brown).