Before I begin, I would like to point out that while I am not a rabbi, I do know much more halachah (and Jewish law) than many wear the title.

If you would like a number of someone extremely knowledgeable in the area PM me and I will email you back a number.

I am orthodox and eat strictly kosher. My take on the matter is as follows. while it may be the case that the same identical meal may be prepared by both an Indian, for example and a Jew, depending on what is being cooked it still may not be considered kosher, becuase of "bishul akum" (being cooked by a non Jew.) This is not a racist or we are better than them thing, rather it comes from us being afraid that a non-Jew would make a mistake and put in a non-kosher ingredient. (We can go into a lengthy discussion as to what is cooking, how much cooking, who is a Jew, but for our simplistic case let's just accept that a religious Jew, because s/he would know and be familiar with the kosher laws, has to be present and light the fire that the food is cooking on.)

As 'wideman' stated you also don't know about the history of the utensils and the details of all of the ingredients and the ingredients of the ingredients.

So to sum up my simplistic but realistic case, if everything is cold, never cooked, and not salty or spicy, and you know that everything is truly vegetarian and they cleaned the utensils before preparing your food, it would probably be ok...but then we get into "marat ayin" (someone would see you eating there assume that it was kosher and then order something not kosher) but that is a discussion for a different day.

I personally do not eat there.