Cut chicken breast, mushrooms, and onion into bite-sized pieces.
Heat olive oil in a pan and sauté the onion.
Add chicken breast and mushrooms, and stir-fry until cooked.
Add rice and stir-fry for 1-2 minutes.
Pour in soy milk and water, then cook the rice slowly over low heat.
Season with salt and black pepper.
Once all ingredients are cooked, turn off the heat and serve in a bowl.