Sift cake flour,sooji ,salt and baking powder together.add soda water and knead the dough.do not make it too soft.cover with wet cloth for 10 to 15 min.knead well
Make small balls and roll them like poori by sprinkling very little flour
Deep fry on medium heat.till light brown
Put them in preheated oven at 180 degree Celsius for some minutes to bake till they turn golden brown.. your poori is ready
Grind coriander leaves , chilies,ginger,salt black salt,tamarind paste,sugar,lemon juice,zeera powder together.add water while grinding.
Sieve the mixture.throw the left over on sieve and retain the water.
Dilute this pani poori mixture as per your taste and need. put it in fridge to cool.
Boil chana by adding salt till they are done.drain water once they are done
Take the above prepared poori make a hole on one side .put boiled and diced potatoes, boiled chana and cold pani poori mixture.