Wash the fish, dab dry, salt and let it rest for about 30 minutes. Mix miso paste with rice wine. Wash fish again, dab dry and coat with miso mixture. Cover and marinate in the refrigerator for about 3 hours.
Clean and wash the spring onion, cut in half or in thirds depending on the length and cut into thin strips. Place strips in very cold water and chill. Clean, wash and halve the mushrooms. Clean, wash and halve the zucchini. Heat 2 tablespoons of oil in a frying pan. Fry the mushrooms and zucchini for 3-4 minutes while turning. Mix stock, soy sauce and starch, deglaze mushrooms and zucchini with it, bring to the boil, season with pepper if necessary
Heat 1 tablespoon of oil in a coated frying pan. Strip the marinade from the fish with wet hands and fry the fish in the pan for approx. 2 minutes on each side. Arrange mushrooms and fish, sprinkle with spring onions
waiting time approx. 3 hours