Using a sharp knife, cut cantaloupe in half. Remove seed and discard. Cut a thin slice off the bottom of each cantaloupe half so it sits flat. With a melon baller or spoon, remove fruit from each half, leaving about an inch of cantaloupe flesh around the edges to create the cantaloupe “bowls".
Place removed pieces of cantaloupe in blender or food processor with pineapple juice, lime juice, yogurt and honey. Cover and blend until smooth. Add mint and blend briefly.
Ladle soup into cantaloupe bowls, garnish with fresh mint sprigs and serve.