Boil water with salt and baking soda: Pour 1 cup water into a pan, add half teaspoon salt and a pinch of baking soda, and bring to a boil.
Mix corn flour into boiling water: Add 1 cup corn flour to the boiling water and mix quickly to form a dough without adding extra water.
Cool the dough: Remove the pan from heat, cover it, and let the dough cool down.
Prepare dough with additional ingredients: Transfer the cooled dough to a plate, add 4 tablespoons refined flour, 1 teaspoon oregano, and half teaspoon black pepper. Knead into a soft dough, adding water teaspoon by teaspoon if needed.
Rest the dough: Cover the dough with a wet cloth and let it rest for at least 10 minutes.
Roll out the dough: Place the dough between oiled plastic sheets and roll it out very thinly with a rolling pin.
Cut and shape nachos: Remove the plastic sheet, cut the rolled dough into squares, trim uneven edges, then cut into triangles to form nachos.
Prick nachos with a fork: Mark the nachos with a fork to prevent puffing during frying.
Fry the nachos: Heat oil well, then fry nachos one by one on low to medium flame until golden brown and crispy. Avoid high flame to prevent puffing.
Cool and season: Remove fried nachos, let cool slightly, then optionally sprinkle with peri peri or chaat masala before serving.