How to Make It
Heat oven to 400°F. Toss together bread crumbs, Pecorino, butter, ½ teaspoon salt and ¼ teaspoon pepper.
Place the chicken in an 8-inch baking dish; season with ½ teaspoon salt and ¼ teaspoon pepper and sprinkle with the bread crumb mixture. Cover with foil and bake until cooked through, 15 to 20 minutes. Uncover and bake until crumbs are golden, 3 to 5 minutes.
Meanwhile, heat the oil in a large skillet over medium-high heat. Add the chard, remaining ½ teaspoon salt and ¼ teaspoon pepper. Cook, tossing, until tender, 3 to 4 minutes. Serve with the chicken.