Stir together Masa Harina and salt in a large bowl. Add water and knead together to form into a dough ball.
Place extra water with oil in a bowl, dip your hands in the bowl to coat with oil and water mixture. This will prevent the dough from sticking.
Separate dough into 6-8 equal balls, flatten the dough ball into disks using both hands to press the dough, about 3 inches wide.
Add about 1 tablespoon of vegan shredded cheese in the center, bring the sides around the cheese to covering the cheese and sealing the dough on top by pinching the sides together.
Flatten dough into a disk, about 1/2 inch thick.
Heat non-stick skillet or cast iron pan over medium-high heat. Lightly brush with oil, add pupusa and cook on both sides until heated through and golden brown, about 5 minutes.
Delicious served with Curtido and Salsa.