Gnocchi with Cavolo Nero, Fennel Seeds, and Pecorino

Black kale, or cavolo nero, which is Italian for “black cabbage,” is also known as palm tree kale in reference to its beautiful palm-like leaves. It can be prepared like ordinary kale and has an intense, earthy flavor. The chili in this recipe adds some heat. Alternatively, you can melt a piece of sharp blue cheese, like Gorgonzola or Roquefort, in the cream and finish the gnocchi with a sprinkling of chopped walnuts.