01 - In a large mixing bowl, combine the olive oil, lime juice, minced garlic, soy sauce, white vinegar, ground cumin, smoked paprika, dried oregano, chili powder, salt, and black pepper. Whisk until all ingredients are fully incorporated into a smooth marinade.
02 - Coat the chicken thoroughly with the marinade, using your hands to work the mixture underneath the skin and into every crevice. Cover tightly and refrigerate for at least 2 hours, though overnight marination yields the most flavorful results.
03 - Preheat the oven to 425°F (220°C), positioning the rack in the center of the oven for even heat distribution.
04 - Place the marinated chicken skin side up on a wire rack set inside a roasting pan. Roast for 45 to 50 minutes until the skin turns deeply golden and crisp, and an instant-read thermometer inserted into the thickest portion of the thigh registers 165°F (75°C).
05 - While the chicken roasts, combine the mayonnaise, sour cream, jalapeños, cilantro, garlic, lime juice, olive oil, and salt in a blender or food processor. Blend until completely smooth and vibrant green. Transfer to a bowl, cover, and refrigerate until ready to serve.
06 - Remove the chicken from the oven and allow it to rest for 10 minutes so the juices redistribute throughout the meat. Carve into serving pieces and arrange on a platter with the chilled green sauce served alongside.