Mix together the soy sauce, ginger
, sugar, garlic, jalapenos and cilantro in a large container. Submerge the ducks in the marinade
and marinate in the refrigerator for 72 hours.
Preheat charcoal embers in a gas grill
, or prepare an electric grill for indirect/low heat. Remove the ducks from the marinade and spear with metal churrasco swords or large metal skewers. Cook over embers, turning frequently, for 4 hours.