This tasty chicken and biscuit casserole is an excellent dish for an everyday family supper. Refrigerated biscuits make it quick and easy to prepare, but it can be topped with homemade biscuits as well. If you aren't a fan of mushrooms, you can omit them or replace them with diced cooked carrots or thawed frozen peas. A sprinkling of fine dry bread crumbs or crushed seasoned stuffing crumbs adds some crunch and flavor.