Run a lime wedge around the rim of a rocks glass and roll the outer edge in Tajín seasoning, then fill the glass with fresh ice.

Combine the tequila, Ancho Reyes, passion fruit juice, lime juice, and agave nectar in a cocktail shaker filled with ice.

Shake vigorously for 15 seconds until thoroughly chilled.

Strain into the prepared glass over fresh ice and garnish with a lime wheel or fresh passion fruit seeds.