Chicken Spaghetti

Meat from one cooked chicken
1 can cream of mushroom soup
1 cup tomatoes
1-1/2 cup chopped onion
1-1/2 cup chopped celery
1 box thin spaghetti
1 10 oz. square grated sharp cheddar cheese
1/4 stick butter

Cut up chicken. Saute onion and celery in butter. Boil pasta in stock, adding water if needed.  When pasta is done drain and add soup and tomatoes.  Add salt and pepper to taste.  Using a 9 x 13 Pyrex dish, layer pasta, cheese and chicken, etc. 

Cook in 350 degree oven about 35 minutes or until bubbly.