Olive Garden is one of my favorite places to eat, but they often have meals for a limited period. One of my favorites was Florentine Soup which they no longer serve.
Copykat Recipes is a great go to site for recipes for your favorite restaurant meals. You'll find some Olive Garden recipes here.
Group Recipes is another place to search for recipes. The recipe I found there for Zuppa Toscana seemed the closest to how I remember the Olive Garden Florentine Soup.