Core 2 apples and trim the tops and bottoms, then cut into thick rings. Heat 2 tablespoons butter in a large skillet over medium heat. Add the apple rings and cook 4 to 5 minutes per side. Add 1/4 cup pomegranate juice, 1 tablespoon sugar and a pinch of salt; simmer, turning, until the apples are glazed, 3 to 4 minutes. If making ahead, let cool, then refrigerate overnight; reheat in the microwave.