A "little engine that could" smokestack and a display atop the cart are the proprietor's only come-ons; he has no written signage. He wasn't a talkative fellow, either, except to quote the price of a roasted banana (10 pesos, about 50 cents at the time) and to ask if I wanted condensed milk (but not in so many words). The photo at bottom shows the bulk of my order, minus a less-than-photogenic plastic fork and the banana chunk that held it in place.
Banana and sweet potato vendor
Cart stationed, this afternoon, on the southwest corner of Vizcaínas and Eje Central Lázaro Cárdenas, Mexico City