Finely chop the mushrooms, onion, and garlic.
Add olive oil to a pan and sauté the onion and garlic.
Add the mushrooms and sauté together.
Once the mushrooms are cooked, add the brown rice and mix.
Pour in heavy cream and milk, and bring to a boil.
Season with salt and pepper.
Finish by adding Parmesan cheese and Yujiman (butter).