Preheat oven 250°C fan forced (put rack in top third of oven).
In a medium sized bowl, make the marinade by whisking the 2 tablespoons of herb mix into a ½ cup of marinade until combined.
Slice chicken breasts across the grain into 1 ½ cm slices.
Add the chicken to the marinade and mix until well coated (I use my hands).
Refrigerate for 15-30 minutes. This step is optional as this marinade is a coating and does not absorb into the meat.
Arrange the slices of chicken from longest to shortest on a board.
Start creating the kebab by pushing the slices onto the first skewer through the middle of the slice of chicken crosswise. Start with the longest slices and work towards the shortest (smallest pieces of chicken).
Work with the meat laying flat out on a board and straighten the pieces as you go. Your kebab will have a pine tree shape.
One skewer at a time, run the other two skewers through the chicken pieces on either side of the middle skewer.
Start at the bottom and run each skewer through the chicken at an angle so it meets the middle skewer at the other end of the kebab.
Move the kebab carefully to a baking paper lined shallow roasting pan.
Use up any leftover marinade on both sides of the kebab and push the marinade in between the slices of meat.
Cook at 250°C fan forced on a rack in the top third of the oven for approximately 15 minutes.
The final internal temperature should reach 65°C. You can take the kebab out at 63-64°C, as the temperature will continue to rise after it leaves the oven.
As soon as the kebab is out of the oven baste it with the reserved salsa verde sauce until it is well coated.
Leave to rest 10 minutes before serving.