Earth apple with egg gives an exceptionally high quality egg white, which surpasses even fish.
Rinse the potatoes, cook them in their skins in a little water (better yet, steam them in a strainer), peel them, and press them through a potato ricer. Steam. Mix 1 egg, half of it into the cooled potato whites, the wholemeal flour and parsley. Knead briskly, otherwise the dough will be tough Form small sausages about 1, 5 cm ø and 3 cm long on a floured board.
Place in boiling salted water and cook at low temperature for 5 minutes with the lid open. Remove with a slotted spoon and drain. In the meantime, blanch (scald) the tomatoes with boiling water, peel, remove the stalk and seeds. Chop the pulp and melt it with the butter in a small pot. Put the gnocchi with the sauce in the plate.