Production method:
1. Choose fresh and good onions (the ones with thick, short roots and lots of onions are better).
2. Clean it up, marinate it with salt for 30 minutes, then rinse it twice with clear water and take it out.
3. Wash the slender carrots, cut them into thin slices, marinate them with salt for 30 minutes, and put them with onions.
4. Cook the sardines in the sauce, cool them and sieve them with a sieve.
5. Pour the cooked sardine sauce on the onions and carrots, and soak the onions and carrots until they are soft.
6. Mix onions and carrots into bundles and put them neatly in a jar. You can eat them in a few days.