KEY BISCAYNE, Fla. -- Residents on this island getaway have the appetite for pricey gourmet foods -- and the money to buy them. Yet, until recently, they had to go to Miami to find them. The only supermarket here, a Winn-Dixie, had a limited selection of specialty foods, and it poorly promoted them.
That changed when Winn-Dixie transformed the store into a gourmet mecca, adding 640 new items -- many of them specialty -- and putting them front and center. Products that once would have