Cream butter, gradually stir in whole eggs and semolina, season, let rest and set for an hour.
With wet hands and coffee spoon form small dumplings, bring water to a boil, turn down (it must not boil).
Put the dumplings in. Do not boil in too many at once, they need space as they rise a lot. When all the gnocchi are in the water, wait a little, then carefully loosen from the bottom of the pot.
Bring water back to a gentle boil, simmer with pot closed for about 30 minutes.
When they have grown noticeably in size, carefully lift them out of the pot and drain on a paper towel.