Chop the herbs and mash thoroughly with the garlic, pepper, and
tomatoes, adding the oil very slowly, and the lemon juice. Add about
three glasses of cold water [I still say this is the *correct*
liquid. But often I use good meat or fish stock.] or as much as you
wish. Put in the onion and the cucumber, season, sprinkle with bread
crumbs, and ice for at least four hours before serving.
How to Cook a Wolf
M.F.K. Fisher