Place one sound, sliced onion, six whole peppers and a bay-leaf in a saucepan with two ounces of good butter on the hot stove ; stir in two tablespoonfuls of flour to thicken, then moisten with a pint and a half of either chicken or white broth (No. 99); mix well with a whisk or wooden spatula, being careful to remove any accumulated' fat. Add half a teaspoonful of grated nutmeg and half a tablespoonful of salt, and cook for twenty-five minutes. Beat the yolks of three eggs separately with the juice of half a medium-sized sound lemon. Pour them gradually into the sauce, being careful not to boil it again after they have been added. Rub through a hair sieve into a serving bowl, and finish with half an ounce of good butter, mixing it well, and serve.