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. Blend until smooth to form the peri peri sauce.
02 - Set aside 3 tablespoons of the blended marinade for basting and serving later.
03 - Rub the remaining marinade thoroughly over the chicken, ensuring complete coverage. Transfer to a large dish or resealable bag, cover, and refrigerate for at least 2 hours, preferably 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 midway and basting with the reserved marinade. Continue until internal temperature reaches 165°F and skin is charred and crispy.
06 - Allow chicken to rest for 5 minutes before cutting into portions. Serve accompanied by lemon wedges and garnish with fresh chopped parsley.