Venetian sauce

Venetian sauce (French: Sauce vénitienne) is a classical French herb sauce used to accompany fish. It consists of:


 * a velouté and fish fumet base
 * equal quantities of tarragon vinegar and white wine reduced with:
 * chopped shallots and chervil
 * White wine sauce
 * Herb juice

After cooking, it is strained and finished with chopped chervil and tarragon.