Make the Blueberry Shrub:

Combine the blueberries and sugar in a nonreactive container and mix well; refrigerate for 3 to 4 days.

Add the balsamic vinegar, mix well, and allow to sit for 4 days longer.

Strain the fruit from the shrub and discard the fruit; refrigerate the shrub for a final 4 days before using.

Make the cocktail:

Combine the bourbon, Cocci Americano, Blueberry Shrub, hibiscus syrup, lemon juice and bitters in a cocktail shaker over ice and shake until chilled.

Add to an old-fashioned glass and top with the splash of soda water. Garnish with the mint sprig.

Enjoy!