Blanch spinach leaves, drain well and squeeze. Peel and chop the onion. Peel garlic as well.
Using a blender, blend milk, spinach, garlic, salt, nutmeg and grated Parmesan.
Mix well dumpling bread with eggs, whipped cream and spinach mixture.
In a frying pan, heat the butter and sauté the finely chopped onion, then add to the dumpling mixture. Fold in the flour and let stand for about 15 minutes. Later, mix well again and season.
Bring salted water to a boil in a saucepan.
Form a test dumpling with wet hands and cook in the slightly boiling water for about 10 minutes. If the dumpling falls apart, correct the dumpling mass with one to two tablespoons of breadcrumbs.
Melt butter in a frying pan until lightly browned. Toss finished dumplings in it and serve sprinkled with Parmesan.