In a blender, combine the strawberries, mint leaves, lime juice, and honey; process until blended and smooth. Taste for sweetness and adjust accordingly.
Transfer the mixture to a pitcher.
Slowly pour the sparkling water or club soda into the pitcher while gently stirring to combine. If time permits, chill it in the fridge for 1 to 2 hours. Stir it before serving.
Pour the drink into glasses, garnish with fresh mint leaves and slices of lime, and serve.
Notes
To make it a cocktail, use a 750ml bottle of Champagne, Prosecco, etc., instead of the sparkling water.
For a cool and refreshing mocktail, chill the drink before serving it.