Wash the mushrooms thoroughly and cut them into bite-sized pieces.
Finely chop the onion and green onion.
Heat perilla oil in a pot and sauté the onion and green onion.
Add the mushrooms and stir-fry together.
Pour in 400ml of water and bring to a boil.
Dissolve 1 teaspoon of doenjang (soybean paste) and add it to the pot.
Add perilla seed powder and simmer for 5 more minutes.
Season with salt to taste.