Chop the onion and garlic.
Heat olive oil in a pan and sauté the garlic and onion.
Add sliced mushrooms and cook them.
Boil the spaghetti noodles in advance.
Pour soy milk into the pan and season with salt and pepper.
Add the boiled noodles to the pan and mix together.
Finish by sprinkling Parmesan cheese and parsley on top.