01 - Combine chili peppers, garlic, red bell pepper, smoked paprika, oregano, cumin, salt, black pepper, olive oil, red wine vinegar, lemon juice, and zest in a blender. Process until completely smooth, scraping down sides as needed.
02 - Measure out 3 tablespoons of the blended marinade and set aside in a small bowl for basting during cooking and serving at the table.
03 - Rub the remaining marinade thoroughly over the chicken, getting under the skin where possible. Transfer to a large dish or resealable bag, cover, and refrigerate for minimum 2 hours or overnight for optimal flavor penetration.
04 - Set grill or oven to 400°F. If using a grill, lightly oil the grates to prevent sticking.
05 - Arrange chicken skin-side up on grill grates or in a roasting pan. Cook for 35-40 minutes, flipping once halfway through and basting with reserved marinade. Continue until internal temperature reaches 165°F and skin is nicely charred and crispy.
06 - Let chicken rest for 5 minutes to allow juices to redistribute. Carve into pieces and serve with lemon wedges, fresh parsley sprinkled on top, and extra reserved marinade on the side.