1. Wash and shred potatoes
2. Put the starch in clear water, drain and set aside
3. Wash and shred pepper
4. Shred tenderloin, shredded mustard and set aside
5. Pour a little oil into the pan, and stir-fry the shredded pork in a hot pan until it becomes broken and discolored
6. Pour shredded potatoes and continue to stir fry
7. Pour 1 drop of white vinegar, pour in the mustard slices and stir fry
8. Add chili shreds and continue to stir fry
9. Add a little salt, quickly stir and fry evenly, pour some cold water, and stir fry a few times.
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