Fleur de sel is a light grey salt that is harvested from the Atlantic sea off the Brittany coast in France. It dries naturally in ponds lined with clay, imparting its distinctive color and trace minerals. It is an essential part of every kitchen and enhances the taste of food. It can be sprinkled on favorite dishes for more complex flavor, or used in desserts for a classic crunch. Here are some tips to use this special French salt.