Buffet Cheese-Scalloped Carrots
["12 carrots, sliced and pared", "1/2 c. butter or margarine", "1 minced onion (small)", "1/4 c. flour", "1 tsp. salt", "1/4 tsp. dry mustard", "1 1/2 c. milk", "1/8 tsp. pepper", "1/4 tsp. celery salt", "1/2 lb. sharp American cheese slices", "2 c. bread crumbs"]
["Preheat", "oven to 350\u00b0.", "Cook carrots as usual in water. Drain."]
["carrots", "butter", "onion", "flour", "salt", "dry mustard", "milk", "pepper", "celery salt", "bread crumbs"]