1. Wash rice under cold water. Drain and place inside the bowl of a rice cooker. 

2. Wash mushrooms and cut into 1/4 inch or 0.6cm thick slices. Place inside a bowl and season with the sesame oil and fish sauce. 

3. Pour the water over the rice and place the seasoned mushrooms on top. Cook using the mixed rice setting on your rice cooker.

4. When done, mix to evenly distribute the mushroom and seasonings throughout. If needed, add more sesame oil and fish sauce to taste.