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