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, scraping down sides as needed.
02 - Measure out 3 tablespoons of the blended marinade and set aside in a small bowl for basting during cooking.
03 - Coat chicken thoroughly with remaining marinade, working under skin if possible. Transfer to a large resealable bag or shallow dish. Refrigerate for at least 2 hours, preferably overnight.
04 - Prepare grill or oven to 400°F. If using a grill, clean grates and brush lightly with oil.
05 - Arrange chicken skin-side up on grill or 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 crispy and lightly charred.
06 - Remove chicken from heat and let rest for 5 minutes. Cut into pieces and serve with lemon wedges, garnished with fresh chopped parsley.