How to make it
Make the marinade: put all of the ingredients in a blender. Blend on high speed to make a puree. Massage the marinade on the chicken and place inside a ziplock bag for at least 12 hours.
Make the garlic infused anato oil: In a small sauce pan, heat the minced garlic and anato oil over low heat. Set aside.
Cook the chicken: Preheat the oven to 170 C. Meanwhile, cut 2 pieces of banana leaves into 4x12 in (Leaf A) and 12x14 in (Leaf B). Slightly heat the banana leaves over the grill until it becomes glossy.
Place Leaf A over the center of Leaf B. Then, place the chicken over the banana leaves and brush evenly with the garlic infused anato oil. Place a tied lemongrass inside the marinated chicken. Fold Leaf A to cover the chicken, then completely cover the rest of the it using Leaf B. Tie the ends with the banana leaf strings.
Bake the chicken in the oven at 170 C for 45-50 minutes. Transfer the chicken to the grill. Cover it with a large bowl or hotel pan then grill for two minutes.
Take the chicken off the grill and top it with fried garlic bits and spring onions.