Sweet Potato Pie
["1 1/2 lb. sweet potatoes", "1 c. milk", "1 c. sugar", "1 stick butter", "1 egg", "2 tsp. vanilla flavoring"]
["Boil the potatoes until done.", "Mix the potatoes, butter and sugar; stir.", "Add the egg and milk.", "Stir the vanilla into the mixture", "and", "pour\tinto an undone pastry shell.", "Cook at 400\u00b0 for", "10", "minutes, then turn to 350\u00b0 and let cook 50 minutes."]
["sweet potatoes", "milk", "sugar", "butter", "egg", "vanilla flavoring"]