When the dough rests you can prepare the stuffing. Take besan flour in a mixing bowl, add fine sooji to it.
Add oil, then ajwain seeds, jeera, chilli flakes and required salt.
Add hing. Mix well with a spoon. Now add little water.
Keep mixing add more water if needed, you should be able to roll into a dough that's the right consistency. Make small balls from the dough and set aside.
Make small marble sized balls from the dough. Take one ball flatten it slightly using a rolling pin. Keep the stuffing.
Pull the edges to the center and seal it. Flip it and press it slightly so that the stuffing is even on all sides.
Now flatten it using a rolling pin, it should be very thin. Now prick holes using a fork, flip over then again prick holes. Repeat this until you are done with the entire dough. If you have dough remaining you can make plain mathris. Heat oil in a kadai, the flame should low or low medium, you put a pinch of dough it should slowly rise and come, that's the right consistency. Now add 2-3 mathris at a time, deep fry in low flame, flip over and cook.
Cook till it becomes golden brown on both sides. Drain using a perforated ladle, then strain the extra oil using tissue paper. Cool down completely Masala Mathri store in an airtight container.