Mexico Becomes Haute Cuisine Destination

FILE - In this May 30, 2005 file photo, several insects being studied for their nutritional value are seen at the zoology building in Mexico's National Polytechnic Institute in Mexico City, Mexico. (AP Photo/Dario Lopez-Mills, File) (AP2005)

In this July 27, 2012 photo, U.S. Chef Christopher Kostow, left, talks to a vendor as he shops at Mercado San Juan Pugibet, the most gourmet market in Mexico City. (AP Photo/Alexandre Meneghini)

In this July 27, 2012 photo, U.S. Chef Christopher Kostow holds a watermelon as he visits Mercado San Juan Pugibet, the most gourmet market in Mexico City. (AP Photo/Alexandre Meneghini)

In this July 27, 2012 photo, U.S. Chef Christopher Kostow talks to a vendor as he shops at a food market in Mexico City. Kostow, whose Restaurant at Meadowood in Napa Valley has three Michelin stars, wanted to sample the diversity of the countrys fresh ingredients. (AP Photo/Alexandre Meneghini) (AP2012)

In this July 27, 2012 photo, pigs are displayed for sale at a food market in Mexico City. (AP Photo/Alexandre Meneghini)