Anas bin Malik (May Allah be pleased with him) reported:
The Messenger of Allah (Sall-Allahu alayhi wa sallam) said,
"ALLAH, Subhanahu wa ta'ala, will be pleased with
His slave who praises Him
(i.e., says Al-hamdu lillah)
when he eats and praises Him when he drinks".
If a person expresses his gratitude to Allah Subhanahu wa ta'ala,
for food, which besides being a source of nourishment is enjoyable for him,
he gets a reward for it and thus even eating can become rewardable too.