Infusing flavors into alcohol seems impressive and difficult, but it is actually super easy. It works along the same principles as making tea - put something flavored in a liquid for a while, and then take it out.
I had this liqueur when my friend Tanya made it, and I had to make some of my own. Its a sweet, herbal liquor that is best served on the rocks or with seltzer. Its so good that guests will skip over high end whiskeys to get a glass!