Vegas offers plenty of fancy vegan options, but if you're walking the strip and need a quite bite, Chipotle is your place. Located in the Quad, near Harrahs & Margaritaville, across the street from Treasure Island & Caesar's Palace. You can see the sign from the boulevard; it shares space with a couple of other (non-veg friendly) eateries.
They offer sofritas & it's yummy as usual. There's limited seating & it was extremely crowded. We were in line for nearly 1/2 an hour. Not such a quick bite, but it worked for the moment.