Flaky Biscuit Casserole
["1 lb. lean ground beef", "1/4 lb. fresh mushrooms", "1 can French fried onion rings", "1 can cream of mushroom soup", "1 egg", "1/2 tsp. salt", "1 c. sour cream", "1 tsp. celery seed or bon appetit", "1 can Pillsbury Hungry Jack biscuits"]
["Brown meat in skillet.", "Add mushrooms (sliced) and 3/4 can onion rings.", "Cook several minutes.", "Place in greased casserole. Heat mushroom soup (undiluted); stir in 1/2 cup sour cream and pour over meat.", "Cut each biscuit in half and arrange cut side down around edge of casserole.", "Place remaining onion rings in center.", "Beat egg.", "Add 1/2 cup sour cream, celery seed and salt. Spoon over biscuits.", "Bake at 375\u00b0 for 25 to 30 minutes.", "Serves 6 to 8."]
["lean ground beef", "fresh mushrooms", "onion", "cream of mushroom soup", "egg", "salt", "sour cream", "celery", "biscuits"]