This food cart spotted in downtown Phoenix and Roosevelt Row is known for late-night Native American cuisine at various locales. The Rez, an Urban Eatery also can be seen at farmers markets and food festivals serving up frybread — even vegan and gluten-free varieties — plus Navajo burgers, blue-corn nachos, tamales, tacos, crepes, stew, and the menu item we're here for, its signature aguas frescas. Friday and Saturday nights mean aguas frescas till 4 a.m. — more or less. If you see a green jug, spring for the iced cups of the fresh lime-green concoction (though flavors do vary). It's a fun, complex mix of honeydew, basil, pineapple, jalapeno, and some other flavor that's just ... green.