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 form the peri peri sauce.
02 - Set aside 3 tablespoons of the blended marinade in a small separate bowl for basting and serving later.
03 - Rub the remaining marinade generously over the entire chicken surface, ensuring thorough coverage. Transfer to a large dish or sealable bag, cover tightly, and refrigerate for minimum 2 hours or overnight for optimal flavor penetration.
04 - Preheat 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, turning once halfway through and brushing with reserved marinade. Continue until internal temperature reaches 165°F and skin is charred and crispy.
06 - Remove chicken from heat and let rest for 5 minutes to redistribute juices. Cut into serving pieces and arrange on platter. Garnish with fresh parsley and serve with lemon wedges alongside.