1. Put clams in boiling water. Cover the lid and blanch clams until the shell opened, pick up clams which open shells. Filter and keep 1.5 cup of blanched clam water.
2. Beat the egg. Stir the egg and clam water. Shred green onion. Take out the shells of ½ clams.
3. Put clam meat on plate, then put in the rest of clams. Put in egg. Seal with film cling. Cover the lid and steam for 12 minutes in mid-heat. Take out steamed egg. Put in sesame oil and seasoned seafood soy sauce. Put in green onion.