Scallops - opening shells
Hold the shell with the flat side facing down, and insert a table knife. Slide the knife along the bottom shell a little at a time. Open the shell so that the curved part is facing down, and release the meat from the shell with the knife, being careful not to damage the adductor muscle.
Scallops - preparing the adductor muscle
Remove the digestive gland and frill attached to the adductor muscle. Also use a bamboo skewer or similar to remove the string-like portion around the adductor muscle.
Scallops - using frills
Use the tip of a knife to scrape away any sliminess on the frill. Wash with salt water, then rinse with water and thoroughly wipe dry before using.