I first obtained this walnut sauce recipe from a chef of a small restaurant in Vernazza, Italy. It is one of my favorite things to make and I hope you like it too
You can toast the walnuts before hand in a toaster oven (or regular oven) if you want to mellow out their flavor. Some people find walnuts to be pretty overpowering...but if you didn't like walnut taste then this sauce probably isn't for you.