A Vegan truffle is a type of food, one of those which Quark served on the buffet in his bar on Deep Space 9. In 2370 a Tellarite enjoyed an entire plate of Vegan truffles from Quark's buffet. (DS9 novel: Devil in the Sky)

It is not clear if Vegan truffles are truffles native to Vega or truffle made with no animals products, conforming to the principles of Veganism.
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