Wash the brown rice with water.
Cut the mushrooms, onions and capsicum.
In a pan add butter/olive oil and add onions. Saute till pink.
Add mushrooms. Saute till they wilt.
Now add the capsicum. Saute and add the pre-washed brown rice. Saute for 5-7 minutes.
Add salt, pepper and 2 cups water.
Cook for 15 minutes or till the rice are done.