Place the potatoes (skin on) into a large pan of salted boiling water, cook until you can pierce with a fork. Depending on the size of the potatoes, this will take between 30 and 45 minutes.
Carefully, one by one, take the potatoes out of the water and peel them before passing them through a ricer on the work surface. Is important that the potatoes are still hot at this point, to let as much humidity out.
Create a well in the middle, add the egg, flour and grated nutmeg.
Working with a spoon or a fork first, then with your hand gather the dough together and mix until you obtain a uniform mass.
Cover with cling film and rest for ten minutes
Cut the dough into smaller pieces. Lightly flour the work surface and roll the though into a rope about 2 cm in diameter
Using the scraper, or a knife, cut the rope 2 cm apart and gently flour.
Once all the gnocchi cubes are cut, in other to form the symbolic ridges, pressing gently with your thumb, roll them against the floured fork tines.
To cook the gnocchi, drop them into salted boiling water, once they are coming up to the surface, they are cooked. Using a spider, lift them up and place in your chosen sauce.