Hawzah News Agency – Imam al-Sadiq peace be upon him says:

إنَّ أميرَ المؤمنينَ عليه السلام أشبَهُ الناسِ طُعمَةً برسولِ اللَّهِ صلى اللَّه عليه وآله، كانَ يَأكُلُ الخُبزَ والخَلَّ والزَّيتَ، ويُطعِمُ الناسَ الخُبزَ واللَّحمَ .

‘Verily the Commander of the Faithful resembled the Prophet (SAWA) the most in the way that he ate. He used to eat bread, vinegar and (olive) oil, and feed others bread and meat.’

Source: al-Mahasin, v. 2, p. 279, no. 1901