“Fines Herbes” Sauce. (Mrs. Thomas.)
For fillets of mackerel, or veal; see Fillets of Mackerel, under Fish.
Put a piece of butter in a stewpan with a little flour, add to it a little good brown stock, and let it boil. Flavour with a good spoonful of mushroom catsup—fresh mushroom peelings are even better, a little tarragon vinegar, a shallot, and some parsley, both these chopped very fine. At the last moment add the liquor of the fish (or veal, whichever it is you are cooking), and a little lemon-juice—but no wine at all. Pour the sauce over the fish and serve hot.