Caramelized-Apple Skillet Cake

I had the apples, I had the butter, I had the sugar, the vanilla extract, and even the cornmeal. Jimmy was coming to dinner (see here) and, with only an hour or two to prep, I knew there had to be dessert. So I yanked down Karen DeMasco’s newest book, The Craft of Baking, and followed her instructions for a caramelized-apple skillet cake.