Add grated jaggery into a bowl, and dissolve it into some water. Stir and filter the mixture for any impurities.
In a separate bowl, add whole wheat flour, semolina, and salt. Using the liquified jaggery mixture, knead the ingredients into a soft dough with water as required. Let it rest for 10-15 minutes.
Divide the dough into small circular shapes and roll it flat.
Apply oil and fold the rolled out dough into half. Apply some oil again, and then fold it once again to form a triangular shape. Similarly, make more.
Keep them in a butter greased container and pressure cook for 20 minutes or upto 3 whistles.