01 - In a small saucepan, combine the granulated sugar and water. Heat over medium heat, stirring continuously until the sugar is completely dissolved, approximately 2-3 minutes. Remove from heat and allow the syrup to cool to room temperature.
02 - In a blender or food processor, combine the raspberries, freshly squeezed lemon juice, and finely chopped mint leaves. Process until the mixture is completely smooth.
03 - Pass the raspberry purée through a fine-mesh sieve into a large bowl to eliminate seeds and achieve a smooth consistency.
04 - Thoroughly stir the cooled simple syrup into the strained, smooth raspberry mixture until well combined.
05 - Transfer the sorbet base into an ice cream maker. Churn according to the manufacturer's instructions, typically 20-25 minutes, until the mixture reaches a soft-serve consistency.
06 - Transfer the churned sorbet into an airtight container. Freeze for a minimum of 4 hours, or until the sorbet is firm enough to scoop.
07 - Serve the chilled sorbet in bowls or glasses. Garnish with additional fresh mint leaves, if desired.