1 In A Large Bowl, Mix The Beans, Celery, Onion, Parsley And Rosemary. 2 In A Separate Small Bowl, Whisk Together The Vinegar, Sugar, Olive Oil, Salt, And Pepper. Add The Dressing To The Beans. Toss To Coat. 3 Chill Beans In The Refrigerator For Several Hours, To Allow The Beans To Soak Up The Flavor Of The Dressing.