01 - In a blender or food processor, combine chili peppers, garlic, red bell pepper, onion, olive oil, red wine vinegar, lemon juice, smoked paprika, dried oregano, salt, black pepper, and sugar. Blend until a homogeneous puree forms.
02 - Pat chicken pieces thoroughly dry. Arrange them in a large mixing bowl or resealable bag, pour marinade over, and toss to evenly coat. Cover and refrigerate for a minimum of 3 hours or marinate overnight for optimal flavor development.
03 - Preheat grill to medium-high or preheat oven to 400°F.
04 - Place chicken skin side up over indirect grill heat, turning occasionally and basting with reserved marinade, until cooked through and the skin is crisp, about 35–40 minutes. For oven baking, arrange chicken on a rack set over a baking tray and roast 40 minutes, turning halfway through.
05 - Allow cooked chicken to rest for 5 minutes before garnishing with fresh coriander or parsley and lemon wedges. Serve hot.