Put all ingredients for the burgers (without the hazelnuts) into a blender or foodprocessor and process until it is finely ground and no large chunks are visible anymore. Check if it sticks together well enough and if not, consider adding an egg. Shape the burgers (this works best with hands that are slightly wet) and bake a little mini burger to check on the flavors used.
If you like the taste dip each burger into the ground hazelnuts so they have a layer coated around them.
Bake in olive oil or coconut oil. Make sure you don't put the fire too high as it will burn the nuts before the chicken is cooked.