Prep the SkewersIf using wooden skewers, soak them in water for 20–30 minutes. Preheat your oven broiler and position a rack 6 inches from the heat. Line a baking sheet with parchment or foil.
Make the SauceIn a bowl, whisk together the cilantro, garlic, orange juice and zest, brown sugar, avocado oil, vinegar, and salt. Set aside half of the sauce for later use.
Marinate the ChickenToss the chicken pieces with the remaining half of the sauce in a bowl. Thread onto skewers or place directly on the lined baking sheet. Optionally sprinkle with a bit more salt.
Broil the ChickenBroil for about 12 minutes or until the chicken is cooked through and golden on the edges.
Make a Tropical Salsa (Optional)Mix some of the reserved sauce with diced pineapple, mango, or avocado for a fresh and juicy topping.
ServeBrush the cooked chicken with the remaining sauce. Serve warm with yellow rice, beans, and fruit salsa if desired.