The food preferred by all is of three kinds, as are their sacrifices, austerities, and charity. Hear now the distinction between them.
~~
Bhagavad Gita - 17:7

It is interesting that these three things are major indicators of the dominant guna of an individual.

@SujuS72

Now here are Krishna's commentary on them:
Sattwic food -
" Promoting life, Sattwa (or: light), strength, health, happiness, and satisfaction, which are flavorful, smooth (or: oleogenous), firm, and hearty: such foods are dear to the Sattwic". (17:8)

@shivaniojha

Since we are seeking to become increasingly Sattwic, we should look at each point of this verse so we can improve our diet and increase our sattwa, remembering that food becomes mind according to Chandogya Upanishad. Mind consists of Food.

@NandiniVenkate3