Lemon Yam Puff
["4 lb. hams", "1 c. packed brown sugar", "1/2 c. butter, softened", "1/2 tsp. salt", "2 tsp. grated orange", "2 tsp. lemon rind, grated"]
["Cook unpeeled whole yams in boiling water for 30 minutes or until tender; drain.", "Peel and mash until", "smooth.", "If dry, add a little hot water.", "Add remaining ingredients and beat until light and fluffy.", "Transfer to a greased 2-quart casserole dish and bake for 30 minutes at 350\u00b0.", "Serves 8 to 10."]
["hams", "brown sugar", "butter", "salt", "orange", "lemon rind"]