Fennel Gratin
This is an almost universal technique for vegetables, an honest, simple gratin with a topping of just a couple of ingredients. Since one of them is rich, flavorful blue cheese, butter isn’t even included. My vegetable of choice here is fennel—an underappreciated and almost always available bulb—but you could put this topping on almost any vegetable. For the cheese, you can use Gorgonzola, the soft Italian cheese; bleu d’Auvergne, a mild cheese from France; Maytag blue, the premier domestic variety; Stilton, the classic English blue; or Roquefort, which is made from sheep’s milk. All are good, but my preferences are for the stronger cheeses, such as Roquefort and Maytag.