Cut the smoked duck, onion, and bell pepper into bite-sized pieces.
Add the smoked duck to a pan and stir-fry over medium heat until the fat is rendered out.
Add the onion and bell pepper, and stir-fry together for 2 minutes.
Add the brown rice and stir-fry with the other ingredients for 3 minutes, mixing well.
Season with soy sauce and black pepper to taste.
Add green onion, stir-fry once more, and finish.