Layer the herb bundle over the grates by spreading the scallions and rosemary sprigs in a single layer. Lay the smashed garlic cloves on top and then cover with the chicken breast.

Combine the baste ingredients in a small bowl. Brush the chicken with the baste and cook an additional four to five minutes until the chicken is cooked through.

Lay the herb bundle on the bottom of a platter. Top with grilled chicken.

Sprinkle chicken breasts lightly with kosher salt and pepper. Spray grill grates with cooking spray. Sear chicken for three minutes each side. Remove to a pan.