1. Heat a comal or griddle. In a large bowl combine the flours or masa harina, and salt. Make a well in the center and pour oil and water. Stir until a wet dough is formed. The dough will not have elasticity like that of other breads.
2. Divide the dough into even sizes.
3. Make a flat disc between your palms.
4. Place crumbled/grated cheese in center of disc.
5. Gather all sides up to make a round pouch and form back into a ball.
6. Once shaped into a ball flatten between your palms into a disc.
7. Place the shaped pupusas onto the heated comal or griddle, and cook for about 4 minutes on each side.

To serve:

1. Beans, salsa, avocado or your favorite sides and toppings