Marinate the chicken and let it sit for at least 30 minutes (overnight is even better).
Bake at 400°F for 25-30 minutes, flipping halfway through. Then broil for 5 minutes to achieve a slightly charred skin.
Melt butter and sauté the chopped garlic for a few minutes until fragrant.
Add the remaining sauce ingredients and simmer for 5-6 minutes.
Coat the chicken with the sauce and sprinkle spring onions on top.
