Cook carrots in salted water until tender. Saute onion in butter. Combine carrots, onion, soup, seasonings and cheese. Put in baking dish. Top with croutons tossed in the melted butter. Bake at 350 F until heated through and topping is browned.
Note- in place of celery soup, try cheddar cheese soup and omit diced cheese. This is also good with soda crackers on top instead of croutons.