Apple Potato Cake is a version of fadge particularly popular in north-eastern Ireland around Hallowe’en.
You take the potato mixture that you are about to make your fadge with, and divide it in half.
Press one-half out flat to make a bottom layer, arrange on it some slices of raw apple, then cover with the remaining flattened half of the fadge mixture.
Bake till nearly done in an oven or baking pot, then lift back the top layer, sprinkle brown sugar on the apples, then return to the oven until the brown sugar has melted.