Sweet Potato Souffl
["5 medium yams", "1/2 stick butter", "2 eggs", "1 c. milk", "3/4 c. sugar", "1 tsp. vanilla", "pinch of salt"]
["Boil yams in water until tender. Remove from water; peel and mash in mixing bowl. Add butter, eggs, milk, sugar, vanilla and salt. Beat with mixer for a minute. Pour into well-greased casserole. Bake at 325\u00b0 for 30 minutes. When firm and lightly crusty, it is done."]
["yams", "butter", "eggs", "milk", "sugar", "vanilla", "salt"]