Run cold water over uncooked wild rice in a strainer for 1 minute, lifting rice with fingers to rinse well.
In a medium saucepan combine wild rice, water, onion, brown rice, mushrooms, garlic, and bouillon granules.
Bring to boiling; reduce heat.
Cover and simmer for 40 minutes.
Stir in chopped pepper.
Cover and simmer about 10 minutes more or until rice is tender.