Let the clams soak in salt water to release any excess sand and grit. Rinse and scrub thoroughly before using.
The size of the clams will dictate the amount of time it takes them to open. Discard any clams that do not open.
You can prepare the clams and stuff them the day before. Line them on sheet pans and cover with foil. Put the poaching liquid in a separate container and refrigerate both until ready to cook. You may need to add a couple extra minutes to the cooking time.