To prepare the spinach and prosciutto dumplings cut the prosciutto slice in small cubes and chop the boiled spinach.
Chop the onion finely and braise it in a pan with 50 g of butter.
Put in a bowl the cubed stale bread, the cubed prosciutto, the flour, the braised onion, the boiled spinach, the chopped wild fennel, a pinch of salt and pepper.
Add the milk and the egg and combine the ingredients until you get a firm dough. If it’s too soft add little more flour, if it’s too dry add a little more milk.
Shape the dough into small balls of about 3 or 4 centimeters in diameter.
Boil the dumplings in a big pot of boiling salted water and let them cook for ten minutes.
Then take them out with a slotted spoon and put them in a heated serving dish.
Put the rest of the butter in a small pot and heat it gently until it’s light brown.
Serve the spinach and prosciutto dumplings with the melted butter, grated Parmigiano Reggiano and a little more chopped wild fennel, if you like it.