Paletas de Plátano Rostizado

You’re probably familiar with the little tune that announces the ice cream truck is coming down the street. In Mexico, there’s a specific whistle (admittedly, not at all pleasant) that lets you know a cart with warm sweet potatoes and plantains is on its way. The purveyors wander through the streets pushing carts that steam the sweet potatoes and plantains in their skins. The whistle is the cry of the steam coming out. For this recipe, you can use either bananas or plantains. Either way, roasting heightens their sweetness and gives them a more complex flavor. If you use plantains, be sure to buy ripe ones: they look black on the outside and feel mushy.