I am definitely not an expert on agave spirits, but I know that I love working with mezcal. Of course tequila has its place, but when I am feeling adventurous mezcal is what I often reach for. Something I have come to realize is that coffee (ie Mr Black) and agave blend well together.
The herbal notes from the Chartreuse and spice from the oregano round everything out
Add all ingredients to a shaking tin.
Add ice and shake.
Fine strain into a chilled coupe.
Garnish with an oregano leaf.
Sip & enjoy.