Place a couple slices of nectarine and a small handful of torn mint leaves in glass. Add lemon juice. Muddle everything together. Add agave syrup.
Add bourbon whiskey of choice. Add a big handful of ice. Top off with club soda. Stir to combine contents. If desired, add more nectarine slices and mint leaves.
Notes
This recipe works well with any stone fruit such as peaches, plums, or cherries.