01 - Combine sugar and water in a small saucepan over medium heat. Stir constantly until sugar completely dissolves, approximately 2-3 minutes. Remove from heat, add mint leaves, and steep for 10 minutes. Strain syrup to remove mint leaves and discard solids.
02 - Add raspberries, lemon juice, lemon zest, and mint-infused syrup to blender or food processor. Blend on high speed until completely smooth and no fruit chunks remain.
03 - Pour blended mixture through a fine-mesh sieve into a clean bowl, using a spatula or spoon to press liquid through. Discard remaining seeds and pulp for a smoother texture.
04 - If using, stir vodka into strained mixture until fully incorporated. This ingredient helps maintain softer texture during freezing.
05 - Transfer mixture to a shallow freezer-safe container. Place in freezer for 4 hours total, stirring vigorously with a fork every hour to break up ice crystals until firm and scoopable.
06 - Scoop sorbet into chilled bowls or glasses. Garnish with fresh mint leaves and serve immediately while frozen but not rock-hard.