Italian Riviera walnut sauce

Here my recipe of the traditional Ligurian walnut sauce and some ideas on how to use walnut sauce. In Genoa, walnut sauce is typically used to season pansotti (a traditional kind of ravioli filled with spontaneous herbs), but actually it is a sauce very good with any kind of pasta.There are different recipes but all the traditional one, all, do not require milk cream. So, be careful not to be fooled by stingy restaurants and canned sauces!