Unlike a flat tortilla, a memela is pinched up at the edge while still on the griddle, forming a small rim that keeps its toppings from sliding off.
A thick disc of corn masa is cooked on a comal, spread with asiento (unrefined pork lard) and black bean paste, then topped with crumbled cheese, salsa, and sometimes shredded meat. Griddle stalls in Oaxaca's markets cook them to order over wood or charcoal fires, often for breakfast.