Sieve all purpose flour and medium rava one after the other. Take them in to a large mixing bowl along with salt. Mix salt with the maida and rava using your hands. Next add 1/8 cup of hot oil and combine well. Next adding water little by little, form pliable dough just like poori dough. Knead well adding a teaspoon of oil and keep it covered for at least 30 minutes to 45 minutes.

Meanwhile we can get the stuffing ready. Heat a pan/kadai adding oil, mustard seeds, split black gram and curry leaves. Saute and when the mustard seeds splutter, split black gram turns slightly brown add rava/sooji. Roast it till you get nice aroma in low flame. Ensure it is not burnt.

Now add turmeric powder, salt, chilly powder and sugar. Mix well. Switch off the flame. Kachori stuffing is ready.

Now make small ping pong sized balls out of the dough prepared in step 1. Roll out each one in to 2.5" to 3" poori. You can make these biscuit rotis in batches. I have shown a batch of 5.

Add 1.5 to 2 tea spoon of stuffing prepared in step 2 on to each rolled out poori at the center. Lift the edges of poori and bring it together to seal. It is shown in the figure below.

Now roll out slowly each stuffed and sealed pooris in to 2.5" to 3" wide circular kachori. Keep the sealed side on top while rolling. Repeat the process with all 5 of the batch.

Now heat heavy bottom pan/kadai adding around a cup of cooking oil for deep frying. Drop a rolled kachori/biscuit roti in to oil. It will puff up immediately. Turn it to other side and fry till both sides get golden brown color. Similarly fry all the biscuit rotis one by one.

Continue the process with rest of the dough.

Now puffed crunchy biscuit roti/kachori is ready to serve. Munch them and let me know your opinion.

You can add a pinch of baking soda to the maida dough to get more crispier ones. I have not added.

You can add little coriander and cumin seeds powder to the stuffing to enhance the flavor.

Simultaneously rolling-stuffing-rolling and deep frying is difficult. So I advise you to do in batches as I did. After the first batch you can switch off the flame from frying and continue once when next batch of biscuit rotis are ready to fry.