Usually, a recipe that says “a la Mexicana” refers to a dish that is cooked with the Mexican cooking trinity of tomato, onion, and pepper. In this case, Nopales are cooked with these 3 ingredients and a few more add-ons, for flavor and seasoning.
Heat oil in a frying pan over a medium-high heat. Once hot, add the onion and cook for a couple of minutes or until it starts to look transparent.
Finally, stir in nopales and the cilantro sprigs. Let it cook for another 5 minutes to allow the flavors to blend. In case your sauce is too dry, add some tablespoons of water. Season with salt and pepper.