Potato apple cake
Mix together the potatoes, flour and salt. Roll the potato mixture into a round about 2cm/1in thick. Divide into four, and put a couple of layers of apple on top of two of the sections, then sandwich the other two sections on top. Pinch around the edges to seal.
Melt the 25g/1oz butter in a non-stick frying pan over a medium heat. Cook the cake on both sides for about 20 minutes until browned. Remove the top sections and dot the apple with butter. Sprinkle with sugar. Replace the tops and return to the pan until the butter has melted. Remove carefully to warmed plates, and serve immediately.