Add blueberries, basil, lemon juice and honey to a blender. Add honey to the blender last to prevent it sticking. Blend and allow to sit for a minute for any bubbles to settle.
Add ice and sparkling water to a glass and slowly pour the blueberry basil blend over the sparkling water. Go slowly to create a creamy smooth foam.
Garnish with fresh basil, lemon zest and a few blueberries.