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 prepared marinade in a separate container for basting during cooking and serving at the table.
03 - Coat the chicken thoroughly with the remaining marinade, ensuring all surfaces are covered. Transfer to a large dish or sealable bag, refrigerate for a minimum of 2 hours, ideally overnight for maximum 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 the grill or in a roasting pan. Cook for 35 to 40 minutes, turning once midway and basting with the reserved marinade. Continue until internal temperature reaches 165°F and skin is crisped and lightly charred.
06 - Let chicken rest for 5 minutes before portioning. Serve with lemon wedges and garnish with fresh chopped parsley.