Peel the top layer of plastic away from the pellizcada. Remove the pellizcada along with the bottom layer of plastic and place it in your palm with the plastic side up. Peel away the plastic and quickly, but gently, lay the pellizcada on the preheated pan. Cook for about 2 minutes on each side, until opaque and speckled, and they can easily be flipped without sticking to the pan.
Remove from the heat and place it on a flat surface or cutting board. At this point, it will not be cooked all the way through. Using a kitchen towel or cloth napkin to protect your fingers from the heat, press and gently pinch a rim around the edge of the pellizcada; the masa should still be soft enough to do this.
When finished forming all the pellizcadas, add oil to the comal or skillet, or brush each pellizcada with oil, and cook for one minute more on each side or until it’s cooked through and freckled with brown spots.
To serve immediately, remove pellizcadas from the heat and top each with a tablespoon of warm refried beans, some chicharrón en salsa, crumbled cheese, and chopped onion.
To serve later, wrap pellizcadas in a clean kitchen towel, seal in a plastic bag and refrigerate for up to 3 days. They can also be frozen for longer storage. Reheat on a hot surface (comal, pan, or griddle) for a few minutes before serving. If desired, reheat in a bit of oil to crisp up the outside of the pellizcada.