Come as you are, and come early, to this East Austin taqueria from owners and partners Chef Edgar Rico and Sara Mardanbigi. It's a bit scrappy but rewards its visitors with spot-on Mexican-focused cooking. As the name suggests, the menu is all about nixtamalized corn of heirloom varietals, and they roast the corn the day before, then grind it each morning for that day's service. Everything is made in house, and the menu presents a great mix of contrasts, featuring dishes employing ancient methods alongside updated items like duck fat refried beans. The duck carnitas taco, served on a thick tortilla made from heirloom pink corn, is impressive, while the tuna tostada is a study in care and composure. Finish with something bold and sweet like a blueberry, basil and ricotta paleta.