Boston Lettuce Salad with Lemon-Licorice Dressing

Licorice, a powerfully flavored root, has long been a favorite of mine. But it takes time to infuse, even when ground. (You can sometimes buy ground licorice, but you may have to buy a stick and grind it in a coffee or spice grinder.) It is, therefore, best to make this dressing at least a few hours, and preferably a day, ahead. The flavor is intriguing, because the taste of the licorice is not evident at first; it comes long after the initial swallow and it lingers for a while. Needless to