How to Make It
In a cocktail shaker, combine the tequila, guava nectar, lime juice and Jalapeño Nectar. Fill the shaker with ice and shake well. Strain into a chilled rocks glass over the large ice cube and place the jalapeño slice on the ice.
Jalapeño Nectar: In a jar, combine 5 ounces agave nectar with 2 halved and seeded jalapeños. Cover and refrigerate for 24 hours. Strain into a clean jar, cover and refrigerate for up to 2 weeks. Makes 5 ounces.