Take a large mixing bowl take 1 cup sooji and 2 tbsp maida
also add pinch of baking soda, ¼ tsp salt and 1 tsp oil.combine all the ingredients well.

Further add ¼ cup water and start to knead.knead to smooth and soft adding more water if required.
grease the dough with oil. cover and rest for 20 minutes or until the rava absorbs moisture.
now knead the dough again making sure the dough is stiff absorbing moisture.

Divide the dough into half and dust with maida.
furthermore, roll the dough as thin as possible using a rolling pin.
take a small cup and start to make small puris.
drop the prepared puri and press with the spoon to puff up.

In a small bowl mix white matter coriander leaves, cumin powder, chaat masala powder and black salt or regular salt. mix well and keep aside.for pani recipe:

Peel and boil the raw mangos in a pressure cooker For about 5 mint..
the pulp of the boiled skinless mangoes using a chhalni..mango pulp is ready
remove the green chutney in a large bowl. rinse the mixer jar with ½ cup water first and then add this water in the bowl. then add ½ to ¾ cup more water.

Mix well. check the seasoning. add more salt or jeera powder or chaat masala if required. if you want a thin pani, you could add some water. but keep on checking the seasoning, as per your taste.add the boondi to the pani.

You can chill the pani in the fridge or add some ice cubes to it.
making pani puri:
crack the top of the puri with a spoon.
add 2 to 3 teaspoons of the boiled mutter filling in the poori.
stir the green pani first and then add it in the poori. optionally you can add some sweet chutney in the puri.