Cut the mushrooms and vegetables into bite-sized pieces.
Add perilla oil to a pan and stir-fry the mushrooms.
Add onions, carrots, and other vegetables to the pan and stir-fry together.
Add the rice and mix well while stir-frying.
Finish by adding perilla seed powder and soy sauce, then stir-fry everything together.
Sprinkle sesame seeds on top if desired.