Stir all ingredients until chilled. Strain into a rocks glass filled with ice. Hold a lighted match over drink in one hand and orange peel in other hand, with orange side facing flame and about an inch away. Carefully and quickly squeeze orange peel until oils spark. Put out match and drop peel into cocktail. I also added a little oregano leaf for some color because it's one of the last surviving herbs I've got growing at the moment. :)