- Infuse the vanilla-honey bourbon: Cut vanilla beans lengthwise and scrape seeds from pods, adding seeds to large glass jar and setting pods aside. Add a splash of bourbon and muddle to incorporate seeds into liquid. Add remaining bourbon, then stir in honey, vanilla extract, scraped vanilla bean pods, and salt. Let infuse for 24 hours. Remove vanilla bean pods before bottling bourbon.
- Assemble the drink: To a lowball glass, add bourbon and ice. Top with equal parts soda water and 7-Up, adjusting amounts to taste. Garnish with lemon peel and mint sprig.