First, prepare agave syrup by diluting agave nectar with water in 1 : 1 ratio. Fill a tumbler glass with large chunks of ice and set aside.
In a Boston shaker, lightly muddle together cilantro leaves, pieces of red bell pepper, thin slices of green onions (use white parts only) and freshly squeezed lime juice. Add agave syrup and Arrogante Reposado tequila. Stir well.
Add a handful of ice into the shaker and shake vigorously for 15 to 20 seconds. Strain the cocktail into the prepared tumbler glass through a fine mesh strainer to remove pulp and seeds. Garnish the cocktail with several slices of red chile pepper.
Matthew Biancaniello (Eat Your Drink)