1. Prepare a cooked pig's trotters.
2. Chop it into pieces with a knife.
3. Put oil in the pot, add onion and ginger until fragrant, and add pig's trotters.
4. put in the soy sauce.
5. put in water.
6. Add cooking wine.
7. put in aniseed.
8. Add pepper.
9. Add sugar.
10. Add the aged vinegar.
1 1. Add refined salt and turn off the fire.
12. Pour the ingredients in the pot into the electric pressure cooker.
13. Peel potatoes and cut into pieces.
14. Add potatoes and press until the ingredients are cooked.
15. After exhausting, add monosodium glutamate and mix well.