The way to eat dried Undaria pinnatifida is as follows:

1. Rinse Undaria pinnatifida with salt grains several times and soak in clear water for several hours.

2. Boil the water in the pot, add the soaked Undaria pinnatifida and cook for five minutes.

3. Take out Undaria pinnatifida, cool it, squeeze out the water, and add Chili oil. Mix well.

4. Add vinegar, salt and sugar and mix well.