Mix 2 cups corn masa flour with 1 tsp salt and whisk to combine. Then add 1 ½ cups hot water into the flour.
Using your hands, continue mixing the flour and water together until a dough forms. If the dough is dry, add water in 1 tablespoon measurements until the dough forms a playdoh-like consistency. If the dough is sticking to your hands, it is too wet. In that case, add a little bit more corn flour 1 tablespoon at a time (I had to add an extra 2 tbsp of masa flour).
Knead the dough in the bowl for about 2 minutes, then cover the dough with a damp kitchen towel and let it sit for 15-20 minutes to rest.
When the dough is done resting, portion the dough into 2-3 tbsp sized balls and continue forming the ball in your hands until it is smooth.
Using a tortilla press or a heavy-bottomed pan (like a cast iron), place a piece of plastic on the bottom of the tortilla press, or on the table (if using a cast iron). Place one of the masa balls on the plastic, then cover with the second sheet of plastic.
Press using your tortilla press or your cast iron until the masa ball is smooth and flat (and in the shape of a corn tortilla!).
Heat a large hot griddle over medium-high heat. Add the uncooked corn tortillas into the pan and cook for about 30-40 seconds, then flip. Cook for 30-40 seconds again, until slight brown char marks start to form on each side. Flip and cook for a final 30-40 seconds. On this last turn, your tortilla may also rise as you’re cooking it (that’s a good thing!).
When the tortilla is slightly beginning to brown, remove it from the heat. As quickly as you are able (but be careful because the tortilla will be hot!) use your fingers to pinch the edges of the tortilla until a little wall is raised around the entire circumference. Also use your fingers to pinch the interior to create some small pockets and barriers on the tortilla center (great for storing salsa!).
Rub some pork fat on the bottom of the tortilla and place it back on the griddle. Drizzle a bit more pork fat on the top of the corn tortilla and cook until you can see the pork fat beginning to bubble.
Spoon either of the salsas into your corn tortillas while still on the griddle. Sprinkle with chopped onion and queso fresco to taste.
Remove the picaditas from the griddle and eat hot! Enjoy!