Rinse wild rice in a strainer under cold running water for 1 minutes. in med saucepan combine wild rice, water, Onion, brown rice, bouillon granules, thyme and pepper. Bring to boiling; reduce heat. Simmer, covered for 45 minutes. stir Mushrooms, celery and waterchestnuts into rice mixture. Return to boiling; reduce heat. Simmer, covered for 10 - 20 minutes more, or until celery is just tender, stirring occasionally. Serves 8 john wilson, lansing mich