Sauce VALOIS is of this type also :—Put into a small saucepan
two tablespoonfuls of vinegar with one ounce of finely minced
shallot. Reduce over a moderate fire till the shallot has taken
up all the vinegar. Let it get cold, then put the shallot into a
stew-pan, add four yolks of egg and one ounce of butter, mix
over a low fire, then take the pan off, add another ounce of
butter, mix, put on the fire again, and add one ounce of strong
chicken jelly, mix well off the fire, put it on again, add one
more ounce of butter and a tablespoonful of chopped parsley,
and serve. If required for fish, strongly reduced fish broth may
be used instead of the chicken.