2. Wash the duck breast, cut it into thick slices and marinate it with onion, salt and cooking wine for 20 minutes; Wash onion and green pepper separately, cut onion into small pieces, and slice the rest materials.

3. Slice the duck breast with starch, cook it in warm oil, and remove it for later use.

4. Melt the butter in the pot, add the onion and stir-fry until fragrant, and add black pepper, salt, soy sauce, white sugar, chicken essence and broth (or beef soup) to make black pepper juice.

5. Stir-fry onion and green pepper slices until they are cut off. Add duck breast and black pepper juice and stir well.

All right.