Ibn Abbas narrates that: the Prophet (peace and blessings of Allah be upon him) asked Umm Hani if there was anything to eat. Umm Hani (RA) said that there was only dry bread and she felt ashamed of offering it to him. He said: "No! Bring it." He broke the bread into pieces, dipped them into water and added some salt. Then he asked her if there was any curry. She said there was nothing except vinegar. He sent for it and then, sprinkling it over the crumbs, ate them and thanked Allah.
Allah-o Akbar! How thankful our Prophet was to Allah even after getting such a type of food. We, nowadays throw away better food than this.