Maccarones de busa is referring to hard grain pasta, served with a ragù sauce made from lamb, veal or wild boar meat. This dish is one of the specialties of Oristano, one of the 7 Regions of Sardinia

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Other definition:
Maccarones de busa refers to a Nuoro dish of hard wheat bran pasta prepared in the traditional way to make the characteristic 'macaroni' shapes. Nuoro is one of the 7 Regions of Sardinia