Soup alla Canavese is made from white stock, butter, onions, carrot, celery, tomato puree, cauliflower, fat bacon, parsley, sage, Parmesan cheese, salt and pepper.

Chop half an onion, half a carrot, half a stick of celery and a small amount of fat bacon and fry in two ounces of butter. Combine the mixture with a white stock and boil for a few minutes before passing it through a sieve and combining with two tablespoons of tomato puree. Drain half of a blanched, cold cauliflower and break into small bunches before combining with the stock and mixture, along with a small amount of sage and parsley. Let the mixture boil before adding grated Parmesan cheese and pepper.

The dish is traditionally served with Parmesan separately available to add to taste.

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.