There are two versions of pickle relish in the U.S.: Hamburger relish: pickle relish in a ketchup base Hot dog relish: pickle relish in a mustard base There are a wide variety of relishes all over the world, and the general definition of relish is "pieces of vegetables and/or fruits in a sauce." Names for relish include Boston Gurka (Sweden), chakalaka (South Africa), chutney (India), and kuchela (Trinidad and Tobago). In the U.S., "relish" often refers to pickle relish, the most popular variety.