Preheat oven to 350°F (175°C).

Cook broccoli according to package directions and drain well.

Chop onion and celery.

Melt margarine in a skillet over medium heat.

Sauté chopped onions and celery in the melted margarine until softened.

In a large bowl, combine the cream of mushroom soup, water, and Minute rice.

Stir the soup mixture well to combine.

Add the cooked broccoli and Cheez Whiz to the soup mixture.

Stir all ingredients together until well combined.

Pour the mixture into a greased 9x13 inch baking dish.

Bake in the preheated oven for 30 minutes, or until golden brown and bubbly.

Let stand for 10-15 minutes before serving.