Beat egg whites until stiff. Add sugar and beat until peaks form.

In a separate bowl, combine egg yolks, oil, and vanilla sugar and mix well.

Fold egg whites into yolks, mixing gently but thoroughly. Freeze in a 9 x 13-inch pan.

Preheat oven to 375 degrees Fahrenheit.

Toss apples with oil until fully coated. Mix ground nuts, cinnamon, and sugar. Roll apple in the ground nuts mixture until completely covered. You can use your hands to fill in the hard-to-reach spots.

Place apples in a Gefen Parchment Paper-lined 9 x 13-inch pan. Bake, uncovered, for 30 minutes.

Fill the center of the apples with chocolate. Bake for another 15 to 20 minutes.

Serve the apples warm, topped with a scoop of homemade ice cream.