Don't know about other areas . .
. . but back in the '70s food at the Los Angeles temple was damned good. Of course meat, fish, mushrooms, and all lilies (onion, garlic, etc.) and I think eggs, are strictly forbidden as offensive to Lord Krishna.
In areas of India adhering to this diet, asafoetida is used as a replacement for onions and garlic. This is a stinking resin from a large member of the parsley family (the local name translates to "devil's dung" in most parts of the world). I've seen many food writers try to describe the smell and fail, but I can tell you exactly what it smells like - hot SAE 90W Hypoid gear oil. The reason is sulfur in both cases.
I've got a pound of it and have tried it and it does a good job of adding pleasing complexity to the flavors of a vegetable dish, but you have to remember to stir it into hot oil to kill the smell.
