Think before you eat - Mahavagga VI.23.9

The Buddha Gotama taught that compassion for all living creatures was necessary, and recognizing that our food comes from damaging or killing both animal and plant life is important toward understanding the nature of our own suffering. Be aware of what your food was and is, and how it became so, before eating it.

Brushing teeth improves sense of flavor - Cullavagga V.31.1

Gotama said there are five benefits for someone who cleans their teeth: it makes their mouth more attractive, the mouth does not smell foul, the taste buds are cleaned and this improves perception, bile and phlegm do not coat one’s food, and one enjoys their food better.

A meditation on food

All beings subsist on eating, on food, Ahara (Khuddakapatha 4). Ahara, food or nutriment, is of four kinds: 1. ordinary material food (kabalinkarahara); 2. contact (of sense organs with sense objects, phassahara); 3. consciousness (viññanahara); and 4. mental volition (manasañcetanahara) (Samyutta Nikaya 12.63).

Ananda taught that "This body comes into being through food. And yet it is by relying on food that food is to be abandoned" (Anguttara Nikaya 4.159)