Original: The traditional recipe , registered in 1982 by the Bolognese delegation of Accademia Italiana della Cucina , confines the ingredients to beef , pancetta , onions , carrots , celery , tomato paste , meat broth , white wine , and milk or cream .
Simplified: Although Spaghetti alla Bolognese are very popular outside of Italy , it never existed in Bologna , where ragù is served always with the local egg pastas tagliatelle or lasagne .