Separate the baby napa cabbage leaves and wash them thoroughly.
Cut duck meat into bite-sized pieces.
Slice garlic and ginger thinly.
Add duck meat to a pan and stir-fry over medium heat.
When the fat begins to render, add garlic and ginger and continue stir-frying.
Add baby napa cabbage and mix well with the duck.
Season with soy sauce, black pepper, and rice wine.
Cover and steam over low heat for 10–15 minutes.
Add green onion or chili peppers to finish, as desired.