In a bowl, combine the masa harina, salt and water. Start with 1 1/2 cups of hot water, and add more until the dough has the consistency of play dough. You don't want it too wet or too dry.
Let it rest for 60 minutes (I was a little too impatience and let it sit for 40, it worked fine).
Roll into a small ball, about 1 1/2 - 2".
Place the dough in between two sheets of parchment paper and press with a tortilla press.
Fire up a griddle or skillet over medium-high heat. Once the pan is hot, grill the tortilla for 2 minutes on each side.