Purée Soubrise.—Peel three large onions and cut
them up pretty small; melt over a gentle fire two
ounces of fresh butter, and lay in the onions,
cover down the pan, and let them cook for an hour
(the steam preventing their frying), but be careful
they do not colour in the least. Now pour to them
one and a-half pints of white stock or milk and
water, very gradually, season to taste, add some
slices of white breadcrumb, cut diagonally, re-cover
the pan and set it all to cook again for an hour at
least, being careful that it never boils the whole time,
but just keeps at a gentle simmer; then crush it all
through a sieve, allowing it to boil up again if too
thin, or adding a little more boiling milk or stock if
too thick; add a spoonful or two of cream, and
serve. A spoonful of grated gruyère cheese stirred
into this soup just at the last, very gradually, stirring
all the time, is a great addition, and so is a dash of
coralline pepper.