To make the blueberry syrup, place the blueberries, mint, maple syrup, honey, and one quarter cup water into a small saucepan set over medium heat.
Simmer until the mixture is heated through and starts to thicken, approximately 4-5 minutes. As the mixture simmers, gently press the blueberries with a wooden spoon to release juices while stirring to
combine with the other ingredients.
Remove pan from heat and pour through a fine-mesh sieve/strainer to separate the solids. Reserve remaining liquid syrup and set aside to cool. Store syrup in a sterilized airtight jar or bottle in the refrigerator.
To make blueberry lemonade, add lemon juice, and remaining water to a large pitcher. Add blueberry simple syrup, to taste, and stir to combine.
Fill 4 glasses with ice and fill each 2/3 full with the blueberry lemonade mixture.
Top off each glass with some club soda and garnish with sprigs of fresh mint, blueberries, and/or lemon slices, if desired. Enjoy!
To use the syrup in a cocktail, add 1-2 oz of vodka, rum, or tequila (per person) in step four and continue with the rest of the recipe.