 In the middle of the dining room on July 4th, 1924, he tossed whole romaine leaves and whipped up a dressing of garlic-flavored oil, Worcestershire sauce, lemon, eggs, and parm. Voila! A salad was born. Today, about 35% of U.S. restaurants offer some version of Mr. Cardini's salad on their menus. Deborah Rodriguez, CBS News.