01 - Pour chilled lemon-lime soda, pineapple juice, and fresh lime juice into a large punch bowl. Stir gently to combine without losing carbonation.
02 - Use an ice cream scoop to add rounded scoops of lime sherbet onto the surface of the punch mixture.
03 - Allow punch to sit undisturbed for 2 to 3 minutes, permitting sherbet to soften slightly and develop a frothy layer on top.
04 - Gently stir once or twice to swirl melting sherbet through the punch, creating a marbled effect.
05 - Float lime slices and fresh mint leaves on top. Ladle into chilled glasses immediately and serve while cold.