20. WHITE RAVIGOTE SAUCE.
PUT into a small stewpan two tablespoonfuls of Chili vinegar, the same quantities of Tarragon-vinegar and of Harvey sauce; reduce these, by boiling, to half the quantity; then add a small ladleful of good Béchamel sauce, or, if not at hand, the same quantity of white sauce; finish by mixing in two pats of fresh butter, and just before using the sauce, throw in a tablespoonful of chopped and blanched parsley.
When white sauce is used instead of Béchamel, a little cream must be added.