I think there's one more very important aspect of food offering that was not discussed here and that it fulfills one of our basic refuge commitments to the 3 Jewels. The aforementioned refuge commitment is 'In remberance of their kindness, offering the first part of any food or drink to the refuge object.' So, the offering of food and drink is a good practice of awareness towards the kindness and good qualities of the refuge object and in this case, it is a representative of our Lama and Yidam, Lama Tsongkhapa and our blessed protector, Dorje Shugden.
We have received so much benefits from our Lama, yidam and Dorje Shugden that we rarely even think of returning their kindness. It is very bad form as practitioners to be always taking blessings, gifts, protection, teachings and so forth from our Lama, yidam and Dorje Shugden. Hence, when we offer, we think about the blessings and kindness, so we develop a mind that always remember the kindness of those who have helped and assisted us. I believe that will create a mind that is generous, caring and also always to have the karma to truly receive future blessings and benefit from the three jewels.