This one-pot pasta dish with white beans, spinach and sun-dried tomatoes is lively and vibrant and leaves you with an easy cleanup. Toasting the orzo before adding the broth adds another layer of flavor. Another dark, leafy green, such as chopped kale or Swiss chard, can stand in for the spinach, but it may take longer to wilt in the pan. If you use a sturdier green, add it to the pan during the last 5 minutes of cooking time.