Broccoli & Rice Casserole

1 pkg. frozen broccoli
1/2 c. chopped onion
1/2 c. chopped celery
2 Tbsp. cooking oil
2 c. rice, cooked
1 can cream of chicken soup OR mushroom soup
1 sm. can evaporated milk
1 sm. jar cheese whiz

Saute broccoli, onion, and celery in cooking oil in large pan until softened.
Add cooked rice, soup, milk, and cheese whiz to broccoli mixture.
Bake at 350 degrees for 45 minutes in 9x13 inch buttered casserole dish.
Can be made ahead of time.