Cook bacon in large skillet until crisp. Remove bacon and finely chop. Discard all but 2 tablespoons bacon drippings.
Heat reserved drippings over medium heat and cook onion, carrot and garlic until vegetables are tender, about 5 minutes. Let cool.
Combine sour cream, Hellmann's® or Best Foods® Real Mayonnaise, spinach, onion mixture, bacon, cider vinegar, salt and cayenne pepper in medium bowl. Chill at least 2 hours. Serve with your favorite dippers.