01 - Heat the butter in a large skillet over medium heat. Add the onion and sauté for 2-3 minutes until translucent. Add the shredded cabbage and a pinch of salt; cook, stirring occasionally, for 10-12 minutes or until softened. Let cool slightly.
02 - In a large bowl, combine the bread cubes and milk. Let soak for 5-10 minutes until the bread is soft, then mash gently with a fork.
03 - Add the eggs, flour, nutmeg, pepper, salt, parsley, and the cooled cabbage mixture to the soaked bread. Mix well until a uniform, slightly sticky dough forms.
04 - With damp hands, shape the mixture into 8 round dumplings.
05 - Bring the vegetable broth to a gentle simmer in a large pot. Carefully add the dumplings. Simmer (do not boil) for 18-20 minutes, or until the dumplings are firm and cooked through.
06 - Remove the dumplings with a slotted spoon. Serve hot, garnished with extra parsley if desired.