After all the great reviews of her previous books, we wondered how one of our favorite authors, Napa Valley Resident Leslie Mansfield, would continue her popular series of Northern California Vineyard Cookbooks. This book has recipes for that great American past timePicnics, which offers the very best in alfresco dining. Whites and champagnes (if you can keep them cool), as well as reds, are perfect for picnics. Wineries all over Northern California contributed their most popular recipes. But you don't have to be a nouvelle cuisine chef to try them.