Peel and grate the potatoes and the onion. Place the potatoes in a cheesecloth and squeeze as much as you can of its water.
To a bowl, add the squeezed potatoes, onion, parsley, egg, flour, nutmeg and salt. Combine well.
Fill a large pan with a layer of neutral oil, so that the base of the pan is all covered, and heat. Once the oil is hot enough, you can start cooking the gromperekichelcher.
Divide the mixture into 6 and place each fritter into the frying pan. Flatten them down to form the gromperekichelcher. Cook each fritter for about 2-3 minutes on each side.
Prepare a plate lined with kitchen paper towels. Once the gromperekichelcher are ready, place on the plate so that the towels absorb any excess oil.
Sprinkle the gromperekichelcher with salt and serve warm with applesauce.