How to cook 1? Wash the flower nail, mince the ginger and garlic, and cut the pepper into sections for later use. 2. Boil the water in the pot, pour in the flower shell until the shell opens, scoop up cold water, and rinse off the white foam and sand. 3. Pour the oil into the pot and bring it to a boil. Stir-fry ginger, garlic and pepper in a pot. Then pour the flower nail into the pot and stir fry, adding a little pepper. 4. Finally, add the right amount of salt, vinegar and coriander, stir fry a few times, and then take out the pot.