Babalu Tacos and Tapas is positively great. They have a few vegan things on the menu, including their outstanding guac and their black eyed pea hummus.
But I got a couple of almost-vegan items made vegan: the vegetal taco (just ask them to hold the cheese. It is delicious!) and the black bean burger, which came with guac, onion, arugula, and a delicious sauce.
They normally fry the black bran burger, which requires an egg bath, but for vegans, they skip the egg bath and grill it instead. It was outstanding.
Their iced tea was also good. Ask for it with lime, for an unexpected treat.
They have locations in Jackson, Memphis, Knoxville, Birmingham (Alabama, not England), and Charlotte.