01 - Combine blueberries, sugar, lemon juice, lemon zest, and water in a small saucepan. Cook over medium heat, stirring occasionally, until blueberries burst and sugar dissolves, approximately 5 minutes.
02 - Remove saucepan from heat and allow the mixture to cool for 10 minutes.
03 - Transfer the cooled mixture to a blender or food processor. Blend until completely smooth, with no visible fruit pieces remaining.
04 - Pour blended mixture through a fine-mesh sieve into a clean bowl, pressing with a spoon to extract liquid. This removes skins and seeds for a silky texture.
05 - Pour strained mixture into a shallow, freezer-safe container. Place in freezer for 4 hours total.
06 - Every hour during freezing, remove container and stir vigorously with a fork to break up ice crystals. This ensures a smooth, creamy final texture.
07 - Let sorbet sit at room temperature for 5 to 10 minutes before serving to soften slightly. Scoop into bowls or cones.