In a mixing bowl, combine flours, nigella seeds, ajwain, chaat masala and salt. Whisk well. Add the melted ghee or oil and mix until crumbs form. Add enough water to make a firm dough. Cover and set aside for 20~30 minutes.
Divide the dough into 3~4 piece, then roll each one out into a round roti making sure not to roll it too thick or too thin.
Cut the roti into small diamonds using a pizza cutter or a knife.
Heat oil for frying on medium flame. Gently slide in the dough pieces into the hot oil and fry until golden brown on both sides.
Remove using a slotted spoon onto a paper towel lined plate. Repeat with the remaining dough. Once completely cooled, store the nimki in an airtight container and Enjoy!!