Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   6                    apples; medium -- tart
   1 1/2  cups          flour -- unbleached
   2                    lemons; medium -- juiced
     3/4  cup           milk
   3      tablespoons   sugar
   1      tablespoon    rum
   3      tablespoons   butter
   2                    egg whites -- large
     3/4  cup           sugar
   1      tablespoon    butter -- to grease cake pan
   2                    egg yolks; large -- divided *
   1      teaspoon      vegetable oil
     1/2                lemon -- juice and zest
   3      tablespoons   confectioners' sugar
   1      teaspoon      baking powder

Preparation:

* Do not put the egg yolks together as they will be used individually. Peel apples, cut in half and core. Cut decorative lengthwise slits in apples, about 1/2-inch deep. Sprinkle with lemon juice and sugar. Set aside. Cream butter and sugar together. One at a time, beat in egg yolks. Gradually beat in lemon juice and grated peel. Sift baking powder and flour together. Gradually add to batter. Blend in milk and rum. In a small bowl, beat egg whites until stiff. Fold into batter. Generously grease a Springform pan. Pour in batter and top with apple halves. Brush apples with oil. Bake in a preheated 350F oven for 35 to 40 minutes. Remove from pan and sprinkle with confectioners' sugar