I'm a clam chowder girl. Always have been. I almost ALWAYS keep a can (or 6) of Campbell's Chunky New England Clam Chowder in the pantry.
Clam chowder always contains clams (duh) along with diced potatoes, onions and celery. Prior to liturgical changes in Vatican II, clam chowder was often served in restaurants on Fridays in order to provide a seafood option for Catholics, as they were required to abstain from meat on Fridays. Even though the abstinence now only applies to Lent, many restaurants still upkeep the Friday clam chowder tradition.