Pork Tenderloin with Whiskey Sauce

Whiskey sauce on a steak, pork, and even a tortilla española is a very Andalusian treat. But, whiskey itself is not top-of-mind on the Spanish spectrum of drink. So, why this sauce? Whiskey producers from Northern Europe would age their liquor in sherry casks, and if times were lean, they would trade whiskey for the finest barrels from Andalusia. With a glut of whiskey around, regional chefs put the booze to use in creative ways, this sauce chief among them.