Insert
the knife between the shells and move it right and left. Open
the shell by cutting the muscle holding it together.
Open
the other shells using the same method described in #2.
Remove
the muscle and the stringy part around it.
Cut
it in half towards the thicker part of its ball shaped meat.
Scrape
out the unwanted portion using the knife.
You're
done. Add salt to the meat and put it in a thin bamboo colander.
Wash it with water, shaking it in the colander until it's clean.
Keep it as fresh as possible and do not add too much seasoning.