Firstly soaked sabudana for 1 hour, then Blanch it for 2 minutes in microwave.

Now after blanching sabudana, add cucumber, carrot, black pepper powder, black salt, green chillies, cumin powder, lemon juice and mix it up properly. Keep aside.

Now take bowl put maize flour, wheat flour, salt, oil and make a soft dough.

Then make small Puri with rolling pin and board, take a small bowl and cover the bowl with Puri properly.

Now in kadhai heat oil and on sim deep fry it and make all bowls like this.

Now make some nachos style mathri from the dough for garnishing.