Place everything, except the chicken, into a food processor and blend until smooth and creamy, stopping to scrape down the sides as necessary. You should end up with about 1 cup of marinade.
Set aside half the marinade for later and pour the rest into a large bowl. Stir in the chicken, cover and refrigerate for at least 4 hours up to overnight.
Heat your grill to medium high heat and skewer the chicken.* Grill for 2-3 minutes per side (a total of 8-12 minutes) or until no longer pink inside.
Serve with the extra sauce for dipping and garnish with more fresh mint and cilantro.
DEVOUR.
Notes
If using bamboo skewers, make sure to soak them in water for at least 1 hour!