Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      medium        yellow onion -- chopped fine
   2      tablespoons   butter
   3      tablespoons   vegetable oil -- (or olive oil)
   1      slice         rolled pancetta -- * see note
   1 1/2  cups          canned Italian tomatoes
     1/2  small         dried hot red pepper -- chopped fine (1/2
                        to 1)
                        salt -- to taste
   1      pound         pasta
   3      tablespoons   parmesan cheese -- freshly grated
   1      tablespoon    romano cheese -- freshly grated

Preparation:

* 1/4 inch thick, cut into strips 1/2 inch wide and 1 inch long (or bacon, if pancetta not available) Sauté‚the onion in a saucepan with all the butter and oil until it is pale gold. Add the strips of pancetta and sauté‚for about a minute. Add the tomatoes, chopped hot pepper and 1 1/2 tsp of salt. Cook over medium heat, uncovered. The sauce is done when the tomatoes and the cooking fat separate, about 25 minutes. Turn off the heat and taste for salt. Add sauce to cooked pasta and mix. Add the Parmesan and the Romano and mix very thoroughly