Simple and rich, this sauce from the Piedmont can be layered with polenta and cheese for
polenta pasticciata, or tossed with fresh or dried egg pasta such as fettuccine or
garganelli, a short, tubular, ridged pasta that is a specialty of Romagna and sometimes flavored with nutmeg. The sauce is essential to
polenta di Natale, or the Christmas polenta of Mantua, where
½