Broccoli Rice Casserole

Believe it or not, this is the very first time that I have made this side dish.  I have always liked to eat this - looking for it at potlucks - but until tonight had not made my own version.  I had some left over rice (and we ALWAYS have broccoli) so I put this together earlier in the day.  

1 cup celery (I used less than that)

1/2 stick margarine or butter

1 cup onion (I used less than that)

8 oz. shredded cheddar cheese (I used about 6oz. of  cheddar jack)

2 cups cooked rice

1 can cream of mushroom soup

1/2 can of evaporated milk (I may have used a bit more than 1/2 can - I just poured until it looked right)

12 oz. frozen broccoli 

Saute onion and celery in butter.  Thaw broccoli in microwave.  Combine all with remaining ingredients.  Bake in a 2 quart casserole at 350 degrees for about 45 minutes.