"Why don't you eat garlic and onions?"...

"Why don't you eat garlic and onions?"

According to Ayurveda, India's classic medical science, 
foods are grouped into three categories Sattvic, Rajasic 
and Tamasic , foods in the modes of goodness, passion and ignorance.
Onions and garlic, and the many other  plants are classified
as Rajasic and Tamasic, which means that they increase
passion and ignorance.
Many vegetarians do not eat onions and garlic for
various reasons.
Buddhists, Jains and Krishna  devotees  and practicing Bhakti-yogi, offer food as ' Bhog'  without the use of onion
and garlic. The reason for not taking onions and garlic is
very simple.
It is not at all complicated. According to the instructions 
very clearly given in the Bhagavad Gita, devotees of Lord Krishna are meant to eat only the remnants of food offered 
with love and devotion to Lord Sri Krishna.
Garlic and onions are unworthy of eating. 
Also in the Bhagavad-gita Lord Krishna advises
against pungent foods such as onions and garlic.
“Foods that are too bitter, too sour, salty, hot, 
pungent, dry and burning are dear to those in the
mode of passion. Such foods cause distress, misery
and disease.”
When we satisfy Krishna by offering him foods 
according to his satisfaction, we also  fully satisfied
in our eating and will go towards spiritual perfection.