Chicken Casserole For Party

12 oz. uncooked broken spaghetti
4 c. cooked, cubed (1/2-inch) chicken
1 1/2 c. cubed (1/2-inch) cooked ham
1 c. chicken broth
1/2 c. chopped onion
1/2 c. chopped green pepper
1/2 tsp. celery salt
2 (10 3/4 oz.) cans cream of mushroom soup
1 (4 oz.) jar chopped pimiento, drained
1 (4 oz.) can sliced mushrooms, drained
1/2 tsp. pepper
3 c. (12 oz.) shredded Cheddar cheese

Cook spaghetti according to package directions; drain. In large bowl combine all ingredients except cheese; mix well. Stir in 1 1/2 cups cheese. Spoon into greased 13-inch by 9-inch baking dish. Bake in 325° oven for 55-65 minutes or until heated through. Sprinkle with remaining cheese; bake two – four minutes or until cheese is melted. Makes 12-15 servings.