Cheesy Broccoli Cauliflower Casserole 2 Recipe

Wash and steam broccoli and cauliflower until slightly crunchy. When cool, chop into bite-sized pieces. Cook rice in the 1 1/2 cups cold water; add chopped onions to rice as it is cooking. Place broccoli-cauliflower mixture and rice mixture together in a large casserole dish. Add water chestnuts, soup, and Cheez Whiz; mix well. Bake at 350 degrees for 35-40 minutes. Best when made a day ahead. Serves 10-12.