This is a blend of Pinot Gris, Auxerrois and Pinot Blanc made in the traditional method.  The rules say that it has to spend a minimum of 9 months on its lees but Turckheim give this at least 12 months (sometimes as much as 18 months) on the lees to add depth of flavour.  This has a nose of baked apple with wonderful freshness, a brisk fizz and a cleansing finish.  A wondefully original glass of fizz and excellent value too.