In a sauce pan, combine the first five ingredients in order and bring to a boil. Remove from heat. Place egg yolks in large stainless bowl, and slowly whip the heated ingredients into the eggs. Put all whipped ingredients into sauce pan and bring to a minor boil. Remove sauce pan from heat.
Ingredients are ready for the ice cream maker.
For the apples Peel and core the apples. In a large bowl, combine rum, water and lemon juice. Add peeled apples and let marinade for one hour. In a separate bowl, combine crumbled Shortbreads, cinnamon, nutmeg and brown sugar. Pull apples from marinade and dredge lightly with flour.