01 - In a small saucepan, combine blueberries, sugar, lemon juice, lemon zest, and water. Cook over medium heat, stirring occasionally, until the blueberries burst and the sugar dissolves completely, approximately 5 minutes.
02 - Remove the saucepan from heat and allow the mixture to cool for 10 minutes to room temperature before blending.
03 - Transfer the cooled mixture into a blender or food processor. Blend until completely smooth, ensuring no lumps remain.
04 - Pour the blended puree through a fine-mesh sieve into a clean bowl, using a spatula to press through the liquid. This removes skins and seeds for an exceptionally smooth texture.
05 - Transfer the strained mixture into a shallow, freezer-safe dish. Place in the freezer for 4 hours total, stirring vigorously with a fork every hour to break up ice crystals and ensure a smooth consistency.
06 - Before serving, let the sorbet sit at room temperature for 5 to 10 minutes to soften slightly for easier scooping. Serve immediately in chilled bowls or cones.