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 to create the peri peri sauce.
02 - Set aside 3 tablespoons of the blended marinade separately for basting during cooking and as a serving sauce.
03 - Rub the remaining marinade thoroughly over the chicken, coating all surfaces evenly. Transfer to a large dish or sealable bag, cover, and refrigerate for at least 2 hours or overnight for maximum flavor penetration.
04 - Heat 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 to 40 minutes, turning once halfway through and brushing with reserved marinade. Continue until internal temperature reaches 165°F and skin is charred and crispy.
06 - Let chicken rest for 5 minutes to allow juices to redistribute. Cut into serving pieces and garnish with fresh parsley. Accompany with lemon wedges and reserved sauce.