Like fashion, food comes in and out of style. Take the coconut. Once considered a novelty drink of the tropics, coconut water has shed its husk and is now packaged in sleek, 14-ounce bottles, selling for $3.50 a pop. If Diane Ragone has her way, the next food to rise from the ashes of changing cultures and tastes will be breadfruit. What’s more is it just might curb world hunger along the way.