01 - Combine water and granulated sugar in a small saucepan. Place over medium heat and bring to a gentle boil, stirring continuously until sugar completely dissolves, approximately 2-3 minutes.
02 - Remove saucepan from heat source. Add fresh mint leaves to hot syrup and let steep for 10 minutes to extract aromatic oils and flavor.
03 - Pour syrup through a fine mesh strainer to remove mint leaves. Allow strained syrup to reach room temperature before proceeding.
04 - In a mixing bowl, whisk together cooled mint-infused syrup, freshly squeezed lemon juice, and grated lemon zest until fully incorporated.
05 - Transfer mixture to ice cream maker and churn following manufacturer's guidelines for 20-25 minutes until mixture reaches thick, slushy consistency.
06 - Spoon churned sorbet into freezer-safe container. Cover securely and freeze for minimum 4 hours until firm enough to scoop.
07 - Scoop frozen sorbet into chilled bowls or dessert glasses. Decorate with fresh lemon slices and mint sprigs if desired.