In a high speed blender, combine the lime juice, blueberries, basil leaves and 1 cup of water. Blend until smooth.
Heat the remaining two cups of water and bring to a simmer. I like to use my electric kettle to save time with this step. In a medium bowl, whisk the honey with the simmering water and continue to mix until dissolved, creating a simple syrup.
Allow to cool for 10-15 minutes.
Add the cooled simple syrup to the blended blueberry mixture and blend until combined.
Using a mesh sieve, strain the limeade into a pitcher. Discard the pulp.
Chill in fridge until ready to serve.
To serve, fill a glass with ice and fill halfway with blueberry limeade and top with sparkling water!
Garnish with a basil leaf if youre feeling fancy.
Cocktail Variation: Add 1 ounce of vodka to large glass and top with limeade and sparkling water.