Clean and slice the mushrooms into bite-sized pieces.
Julienne the onion and carrot.
Heat cooking oil in a pan and sauté the onion and carrot.
Add the mushrooms and stir-fry together.
Pour in the soy milk and bring to a boil.
Season with perilla powder, salt, and pepper.
Simmer on low heat for another 2-3 minutes.
Transfer to a bowl and serve.