1. Prepare ingredients: cooked mutton offal, dried pepper, thirteen spices, shredded onion, shredded ginger, sliced garlic, soy sauce, cooking wine, pepper, coriander and salt.

2. Put the cooked mutton offal into cold water, then soak it with a little salt, vinegar and flour, and rinse it with water for later use.

3. Shred pepper, ginger, onion, garlic and coriander.

4. Heat the wok over medium heat, pour in a little cooking oil, stir-fry shredded ginger, garlic slices, pepper and pepper, add mutton offal, stir-fry over high heat, and stir-fry shredded onion, shredded coriander, shredded vegetables, soy sauce and cooking wine.

5. Add thirteen spices and salt to taste when cooking.