In large bowl,combine broccoli,celery soup, 1 c of the grated cheese and the minced onion. Pour into lightly greased CP. Sprinkle top with crushed crackers or mix in the potatoes,then top with remaining cheese. Cover and cook on LOW for 5 to 6 hours. HIGH for 2 1/2 to 3 hours.Makes 4 to 6 servings or about 2 qts. Added note. Casserole may be spooned into baking dish and garnished with addtional cheese and broken chips and baked for 5 to 10 mins. in a 400 degree oven to brown to a great golden color.