1. Combine water and sugar in a saucepan over medium heat. Cook 4 minutes, stirring to dissolve sugar. Remove from heat; cool to room temperature. Place sugar mixture, avocado, lime rind, lime juice, and kosher salt in a food processor; process until smooth. Divide mixture evenly among 6 (4-ounce) ice-pop molds. Top with lid. Freeze 4 hours or until thoroughly frozen.