Place the bread and milk in a bowl and leave to soak for at least 30 minutes, then squeeze to remove the excess milk. Place the bread in a mixing bowl and stir through the butter. Add the eggs, 100 g of the Grana, the flour, nutmeg and salt and pepper to taste. Mix to combine well. Cover and refrigerate for 1 hour.
Shape the mixture into 2 cm balls. Bring the stock to the boil in a larg