Sauce Piquante.

Brown the butter by shaking it over a clear fire in a saucepan. Heat the cupful of liquor to a boil, skim and season it with salt and pepper. Skim again before stirring in the flour wet up with cold water. As it thickens, put in the butter, herbs, mustard, and vinegar. Boil up, pour half over the tongue, the rest into a sauce-boat.