So the green herb syrup is a
generic term for all green herbs.
You can use thyme, rosemary, dill...
It's just a basic recipe
for like all cool drinks that
demand for simple syrup.
For example, a mezcal sour with
coriander syrup instead of normal
simple syrup.
For a gin fizz with a lemon
verbena syrup or even an dill syrup.
Basically very simple blends
in simple syrup. Room temperature,
but always add
a little bit of ascorbic
acid, which is going to
keep that bright color
in your herb simple syrup.