Add garlic, Fresno chilies, habanero, red bell pepper, spices, lemon juice, vinegar, and oil to a blender. Blend into a smooth marinade.
Pat chicken leg quarters dry and season lightly with kosher salt.
Coat the chicken evenly with the marinade and refrigerate for 2–4 hours.
Preheat oven to 220°C (425°F), or preheat your grill to medium-high.
Place chicken on a baking tray (or grill) and cook for 40–45 minutes, flipping once halfway.
Optional: Baste with extra marinade during cooking for added flavor.
Ensure the internal temperature reaches 74°C (165°F).
Rest for 5 minutes before serving hot with sides.