01 - In a large bowl, whisk together the olive oil, lime juice, minced garlic, soy sauce, white vinegar, ground cumin, smoked paprika, dried oregano, chili powder, salt, and black pepper until well combined.
02 - Coat the chicken thoroughly with the marinade, using your hands to work the mixture under the skin for even flavor distribution. Cover and refrigerate for at least 2 hours, preferably overnight for best results.
03 - Preheat the oven to 425°F (220°C).
04 - Place the chicken skin side up on a baking rack set over a roasting pan. Roast for 45 to 50 minutes, until the skin is golden and crisp and an instant-read thermometer inserted into the thickest part 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. Transfer to a bowl and chill until ready to serve.
06 - Remove the chicken from the oven and let it rest for 10 minutes before carving. Serve with the green sauce on the side, alongside roasted potatoes, rice, or a simple salad.