Tomato sauce piquante

Ingredients: Ham, butter, onion, carrot, celery, bay leaf, thyme, cloves, peppercorns, vinegar, Chablis, stock, tomatoes, Velute or Espagnole sauce, castor sugar, lemon.

Cut up an ounce of ham, half an onion, half a carrot, half a stick of celery very fine, and fry them in butter together with a bay leaf, a sprig of thyme, one clove and four peppercorns. Over this pour a third of a cup of vinegar, and when the liquid is all absorbed, add half a glass of Chablis and a cup of stock. Then add six tomatoes cut up and strained of all their liquid. Cook this in a covered stewpan and pass it through a sieve, but see that none of the bay leaf or thyme goes through. Mix this sauce with an equal quantity of Velute (No. 2) or Espagnole sauce, (No. 1), let it boil and pass through a sieve again and at the last add a teaspoonful of castor sugar, the juice of half a lemon, and an ounce of fresh butter. (Another tomato sauce may be made like this, but use stock instead of vinegar and leave out the lemon juice and sugar.)

Source: The Cook's Decameron: A Study In Taste, Containing Over Two Hundred Recipes For Italian Dishes from a project that puts out-of-copyright texts into the public domain. This is from a *very* old source, and reflects the cooking at the turn of the last century. Update as necessary.