Combine all-purpose flour, whole wheat flour, salt, and curd in a mixing bowl.

Gradually add water while mixing to form a soft and sticky dough.

Add a tablespoon of oil and knead the dough for a few minutes.

Let the dough rest for at least 30 minutes.

Heat a roti tawa (flat griddle) over medium heat.

Pinch off a small portion of the dough and place it on an oiled work surface.

Spread the dough with your palm and fingers into a thin sheet.

Fold the dough to form an envelope shape.

Fold the envelope again from the sides to create a small, folded napkin shape.

Place the folded dough on the hot tawa.

Cook on both sides, drizzling with oil, until golden brown and toasted well.

Serve hot with Sri Lankan Egg Curry or Chicken Curry.