Chop up the spinach leaves and puree in a blender with the egg, water, salt and grated nutmeg. Add the flour to the spinach puree and stir with a wooden spoon to form a smooth dough.
Use the sparrow slicer to plane the dough in boiling salted water and stir.
Bring the sparrows to the boil and strain.
Cream sauce:
Cut the cooked ham into strips or patches and toast them in the butter. Add the cream, the parmesan, and salt and pepper and reduce a little.