Walnut Vinaigrette

A recipe from the incomparable Michael Ruhlman, from "Ratio". This recipe goes beyond simply using nut oil; you can blend the mixture so the nuts are totally pureed, or leave them chopped and slightly chunky if you prefer. Other nuts and nut oils can be used. This dressing is best on a salad with sharp, even acidic ingredients, like apples (or other fruit), endive, radicchio, or watercress.