Finely chop the mushrooms and onion.
Sauté the mushrooms in a pan.
When the mushrooms become translucent, add the onion and oatmeal. Drizzle with olive oil and sauté.
When the onion turns translucent, add soy milk.
Add 1 spoon of Yeondoo, a pinch of pepper, and cheese, then bring to a simmer.
When it reaches your preferred creamy consistency, it's done!