Ancient Celts kept unripe walnuts from launching their annual reign of terror on passersby by steeping them in alcohol to make a dark liqueur. Italians thought this was a great idea, dubbing it nocino. Recipe here
The walnut liqueur nocino tastes like Christmas, with tones of citrus and spice, and will warm you right down to your toes. The two-part process for making nocino is fairly easy -- the hard part is waiting for the liqueur to age!