1 whole chicken, cooked & diced
1/2 c. chopped celery
2 tbsp. chopped onion (you may use a whole onion if desired)
1 jar (4 oz.) pimento, chopped (opt.)
1 can (4 oz.) sliced mushrooms (you may use a carton of fresh)
1 can tomato soup
4 c. grated cheddar cheese
1 pkg. (12 oz.) spaghetti

Cook spaghetti in chicken broth until almost done, but still firm (about 5 minutes). Mix all ingredients including the broth and 2 cups of the cheese in a large casserole dish or in the pot the chicken was cooked in. Top with the remaining cheese. Bake 30 minutes at 350 degrees.