01 - In a small saucepan, combine granulated sugar and water. Bring to a simmer over medium heat, stirring until the sugar fully dissolves. Remove from heat, add fresh basil leaves, and let steep for 10 minutes. Strain to remove basil leaves and set syrup aside.
02 - Place blueberries, lemon zest, freshly squeezed lemon juice, basil-infused syrup, and a pinch of salt in a blender. Blend on high speed until the mixture is completely smooth.
03 - Pour the blended mixture through a fine mesh sieve into a bowl to remove skins and seeds, producing a smoother sorbet texture.
04 - Transfer the strained mixture to a shallow freezer-safe container. Cover and freeze for 4 to 6 hours, stirring with a fork every 30 to 60 minutes to break up ice crystals until the sorbet reaches a smooth, scoopable consistency.
05 - Alternatively, pour the mixture into an ice cream maker and churn according to the manufacturer's instructions for a creamier result.