Thinly slice the mushrooms and spring onions.
Heat the oil in a frying pan or wok over medium heat. When it’s hot, add the mushroom and cover. Turn down the heat and sauté for 5 minutes until the mushrooms have released some liquid.
Add the spring onion pieces and fry for a minute.
Add the soy sauce, mirin, miso, rice vinegar and the beans to the mushrooms, put the lid on and sauté for another 3-5 minutes over low heat until the vegetables are tender. Taste, and adjust to your liking.
Serve with the sesame seeds scattered on top.