01 - Combine sugar, water, and salt in a small saucepan. Heat over medium heat, stirring continuously until sugar fully dissolves, about 2 to 3 minutes. Remove from heat and allow to cool to room temperature.
02 - Incorporate fresh lemon juice and lemon zest into the cooled syrup. If desired, add vodka to improve texture and mix thoroughly.
03 - Transfer the mixture to a shallow baking dish or bowl and refrigerate for at least one hour until thoroughly chilled.
04 - Pour the chilled mixture into an ice cream maker and churn according to manufacturer’s instructions, typically 20 to 25 minutes, until the sorbet achieves a soft, smooth consistency.
05 - Move the churned sorbet into an airtight container. Freeze for a minimum of three hours or until firm.
06 - Let the sorbet rest at room temperature for 5 minutes to soften slightly before scooping into serving dishes.