My friend just returned from a trip to Oaxaca and sent me the message below, which I've attempted to translate from the original Spanish about Itanoni, an inexpensive restaurant that celebrates corn, different organic varieties of corn in an assortment of dishes that are very Oaxacan. My glosses are in the parentheses.
The restaurant's website (in Spanish) is http://www.itanoni.com.mx/ They are located at Belesario Domínguez 513 in the Colonia Reforma (neighborhood), Open 7 am to 4pm, Monday through Saturday, and 8 am to 2 pm on Sundays. Phone 513-9223
The name of the restaurant means the "Flower of the Corn". They offer dishes based on organic varieties of corn. The corn is almost white, very pure and delicious. i ate a cheese and chicken quesadilla with chile de agua, and then a memela (like a sope but unlike the ones I've eaten here in the SF Bay Area, there the masa is cooked on the griddle, so the texture is crisp and the flavor of the corn more developed). I also had coffee and a flan, which were delicious. The coffee is served in an shallow earthenware plate, the sort that you'd use for a broth or a soup. The restaurant is very simple, they have transformed the front part of their home into the restaurant. The restaurant, although simple, is well known. They also have excellent tamales, and what they call "tetelas" which are triangles of folded tortillas filled with one's choice of various things including chicarrón with red salsa, mushrooms with onion and garlic, cheese and chiles de agua and so on. (Tetelas are akin to samosas, usually filled with mashed beans and other goodies; the tetelas are cooked dry on the comal, so you get the texture contrasts between the tortilla and the fillings)
Belisario Domínguez 513, Oaxaca, OAX , MX