Dear Vijaydeep Singh Ji,
Langar is an institution of Khalsa Panth to forge a feeling of equality. All our decisions should be to keep this in mind.
If we want every body to eat together, then we must serve what every body can eat. I know people who cannot eat items which has garlic in it - not because of any religious reason, but because they do not like the smell or the taste.
I know, in our gurdwara, tea with and without sugar is served, this way it serves every one. I know tea is simple, complete meal is complicated, but there is a solution to every problem.
It is important that the items that we serve in langar should include few items that every one can eat and which together makes a complete meal. This is to enable every body to eat together.
I suggest that in one item viz Daal we should not put garlic or onion or both if needed. The individuals who cannot eat items with garlic/onion can then eat chapati or rice with it which is always served in langar; such individuals need not eat the other items served in langar which have garlic/onion in them. This way we enable all to eat together and sustain our fundamentals.
It is not important that every one in the sangat should eat each item served in langar. What is important that every one eats together, this (langer)is the anvil on which the fundamental concept of equality, an essentials ingradient of Sikhi, is forged. We should not make compromise on the fundamentals (eating together), yet be flexible on details viz garlic, onion etc.
Sikhi does not take sustenance from other religions, it is a stand alone teachings of our Guru Sahibs - Khalsa Panth does not live on comparisions. If garlic and onion is not eaten by some groups, it does not mean we Khalsas should do the same or do the opposite. If we do so, in both the cases we will be enslaving ourself to that group and loosing our own bearing. These groups may have their own reason to eat or not to eat some thing, we respect their premise of thinking but do not make it ours. It is their way not ours i.e. not of Khalsa Panth.
With love and respect for all.
Amarpal