Cut the smoked duck and all vegetables into bite-sized pieces.
Without adding oil, sauté the smoked duck over medium heat in a pan to render the fat.
Push the smoked duck to one side and add sliced onions, bell peppers, cabbage, and other vegetables to the pan. Stir-fry them.
Once the vegetables are wilted, mix all the ingredients together and steam over low heat for 5 minutes.
Season with salt and pepper to taste before serving.