In a large bowl, combine the masa harina, ap flour and salt. Mix in the pork lard or oil. Gradually mix in the hot water. The water amount may be a little more or a little less. the masa will let you know as you knead it. When ready, cover with plastic wrap and let it sit for 20 minutes.
After 20 minutes, you will divide the masa into 6 equal portions. Roll into balls and keep covered with a damp paper towel. At this point you want to preheat your griddle/comal for several minutes at medium heat.
In a small bowl, add some water. Keep it near your workspace where you will be cooking the gorditas. Wet the palms of your hands and form the gordita by moving and slightly flattening the masa ball with the palms of your hands. Once it flattens, rotate it gently smoothing out the edges as needed. These gorditas are about 4 1/2-5 inches in diameter.
Place gorditas on preheated surface. Let them cook for at least 3 minutes before attempting to flip over. You should see some browning. If it too light, let it cook another minute or so. If the spots are too dark, turn the heat down slightly. When ready, flip the gorditas and cook for another 3 minutes. At some point you should see the gorditas inflate slightly. That is a good indicator that they are ready.
Keep cooked gorditas in a tortilla warmer. If you prefer a deep fried gordita that will inflate even more, transfer comal cooked gorditas directly to preheated oil in a skillet. Fry for just 30 seconds per side. Transfer to a paper towel lined plate. Gorditas must be sliced open while they are warm to create that pocket. If they get too cold the masa will stick together. Fill refried beans or your favorite guisado and serve right away. Top with your favorite garnishes.