It's off Rundberg in North Austin, in a shopping center. It's set up quite strange, and a menu is impossible to find (until now). The last time we went to Taco More, the owner gave me a menu to photograph.
So. The most important thing here is the salsa bar. Half a dozen different kinds, pickled jalapeños, veggies, fresh onions, cilantro, and more. Try everything. It's all great. Happy Meal orders a pound of meat when we come here. This is meant for a family of four, as it includes 12 tortillas, salad, onions and cilantro. He just sticks with the meat and salad, and it makes a great (and giant) meal. He loves the Al Pastor, but also has eaten the cabrito, and beef fajitas, which he said were all fantastic.
Now, for the vegans, there isn't much, but if you quit whining for a second and get creative, you will have a fantastic breakfast taco in front of you for a buck-fifty. Nopals/Nopalitos (cactus) and potatoes. See? That was easy. Then take that little taco, and get all fancy with the magical salsa bar. I put roasted jalapeños and fresh onions & cilantro on mine. Then cover it with some of that verde salsa. Damn. That's good. And cheap as hell.
Taco More doesn't have a website, Facebook, Twitter - nothing. Check the above link for the menu. But it's real deal Mexican food. If you do not speak Spanish, your waitress will be the one woman there that knows English. Oh, and they takes credit cards, but you can't tip on your card, so bring a few bucks cash to take care of the little ladies that bring you tacos.