If you don’t have beet greens handy, make this easy, light supper dish with kale, Swiss chard, collards, mustard greens, or turnip greens. Serve with some good crusty bread, and dinner’s done. When it’s just me, I make this in a cast-iron skillet, but if I’m serving a guest, I usually braise the greens, then prepare individual gratin dishes of greens for each person.–Robin Mather