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 rub the mixture under the skin and into every crevice. Cover tightly and refrigerate for at least 2 hours, though overnight marination yields the deepest flavor penetration.
03 - Preheat the oven to 425°F. Position the oven rack in the center for even heat distribution.
04 - Place the marinated chicken skin side up on a wire rack set over a roasting pan. Roast for 45 to 50 minutes until the skin is deeply golden and crisp. An instant-read thermometer inserted into the thickest part of the thigh 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 and vibrant green. Transfer to a bowl, cover, 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. Serve with the chilled Aji Verde sauce on the side alongside roasted potatoes, rice, or a simple salad.