Combine onion, garlic, chopped chile, and Green Seasoning in same pot and cook, stirring and scraping up any browned bits stuck to bottom of pot, about 1 minute, then continue to cook, stirring occasionally, until onion is softened and translucent, about 5 minutes longer. Return goat to pot along with any remaining marinade. Add remaining whole chile and reduce heat to medium-low. Gently stir to combine, cover, and cook until meat begins to simmer in the marinade and release some of its juices, about 10 minutes. Uncover and stir.