01 - Heat butter in large skillet over medium heat. Sauté diced onion 2–3 minutes until translucent. Add shredded cabbage with pinch of salt; cook stirring occasionally 10–12 minutes until softened. Allow to cool slightly.
02 - Combine bread cubes and milk in large bowl. Let soak 5–10 minutes until bread softens, then mash gently with fork until evenly moistened.
03 - Add eggs, flour, nutmeg, pepper, salt, parsley, and cooled cabbage mixture to soaked bread. Mix thoroughly until uniform, slightly sticky dough forms.
04 - With damp hands, shape mixture into 8 round dumplings, pressing firmly to hold shape.
05 - Bring vegetable broth to gentle simmer in large pot. Carefully add dumplings. Simmer without boiling 18–20 minutes until firm and cooked through.
06 - Remove dumplings with slotted spoon. Serve immediately, garnished with additional fresh parsley if desired.