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Spaghetti Bolognese or spaghetti alla bolognese or spaghetti bolognaise is a pasta dish invented outside Italy, consisting of a ground meat sauce, served on a bed of spaghetti. Although spaghetti Bolognese is very popular in various countries outside of Italy, ground meat sauce (ragù) is never served with spaghetti in Bologna (or elsewhere in Italy), as the pieces of meat do not adhere well to spaghetti. In Italy, ground meat sauce, also called ragù, is always served with tagliatelle.
In Italian cooking, ragù is a sauce typically made with ground meat, onions, tomato puree, and red wine, and served with tagliatelle.