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 the spices are fully incorporated and the marinade is smooth.
02 - Coat the chicken thoroughly with the marinade, using your hands to work the mixture under the skin and into every crevice. Cover tightly and refrigerate for at least 2 hours, though overnight yields the most flavorful results.
03 - Preheat the oven to 425°F. Place the marinated chicken skin side up on a wire rack set over a roasting pan to allow even air circulation.
04 - Roast the chicken for 45 to 50 minutes until the skin is deeply golden and crisp. Verify doneness by inserting a meat thermometer into the thickest part of the thigh—it should register 165°F.
05 - While the chicken roasts, combine the mayonnaise, sour cream, jalapeños, cilantro, garlic cloves, lime juice, olive oil, and salt in a blender or food processor. Blend until completely smooth, then transfer to a bowl and chill until ready to serve.
06 - Remove the chicken from the oven and let it rest for 10 minutes to allow the juices to redistribute. Carve into serving pieces and arrange on a platter with the green sauce served alongside.