In a medium bowl, use a fork to stir together the masa harina, water, and salt, if using. Once the water is fully mixed into the masa harina, use your hands to mix it into a soft dough.
With your hands, form the dough into golf ball-size balls. You should get between 15 and 20 balls.
Use a tortilla press or a rolling pin to shape the balls into flat tortillas.
Heat a skillet or griddle (ideally cast iron) until it is very hot. Cook the tortillas for about 2 minutes per side, until they are dry and begin to brown in spots.