Combine cilantro, garlic, onion, jalapeno, lime juice, cumin, olive oil, salt and pepper in a processor and blend until smooth. Taste for seasoning.
Add chicken wings to a plastic bag and add marinade. Seal and shake around to evenly coat the wings. Use two bags if necessary.
Put in fridge and let marinate for 2 - 12 hours, no more than 24 hours.
While your charcoal is heating up, remove wings from the fridge, drain marinade, and let them come to room temperature. (If using a gas grill, turn on one side of the grill and preheat to 400 degrees).
Arrange your hot coals on one side of the grill.
Place wings on the direct heat side until charred, about 5-7 minutes, flipping halfway through. This time may vary depending on how hot your grill is.
Move your wings to the indirect heat side for 10 minutes. Flip and cook for another 10 minutes. Time may vary depending on how hot your grill is, so check often for doneness.
Remove from grill. Drizzle with lime juice and chopped cilantro.