German Apple Cake
["1-1/3 sticks of butter", "1/2 C sugar", "1 egg", "Grated peel of 1 lemon", "3/4 C flour", "1 tsp baking powder", "2 large Rome apples, peeled and sliced thin", "Sugar and cinnamon"]
["Preheat oven to 350\u00b0F."]
["butter", "sugar", "egg", "lemon", "flour", "baking powder", "apples", "Sugar"]