Thinly slice the onion and mushrooms.
Heat olive oil in a pan and sauté the onion.
When the onion becomes translucent, add the mushrooms and sauté.
Add oatmeal and mix well.
Pour in soy milk and water, and simmer over medium heat.
Stir and cook until the oatmeal is tender.
Season with salt and pepper to taste.
Serve the finished risotto on a plate and sprinkle with parsley.