This is Picadita
A picadita is an antojito (see this previous post on antojitos/street food for all the information you need on them). They are made using a circle of masa which is then pinched all around its circumference, fried and topped with salsa (red or green as always, remember to ask which is spicier), and a variety of toppings such as cheese, chorizo/longaniza, chicharron, and papas if you so desire. More often served in the morning, picaditas are very tasty, and easily made at home. They can be bought before they are cooked (pinched and made into the correct shape) just the same way you can buy tortillas and memelas. Usually these are sold by indigenous women on streets, but can also be found in local tiendas (shops). In some neighbourhoods (colonias) they come selling door to door, so don’t pass up on this opportunity to try them!
Cost: approximately 6 pesos each for cooked ones, 2 pesos each for “raw” ones.