Make lemon sized balls from poori dough. Add 3 tbsp oil and toss them.
Apply little oil to the rolling pin and roll each poori in circular shape with medium thickness. If the rolled out pooris are too thin, then pooris will not puff up properly. Roll all the pooris and spread the rolled out pooris on a big plate. Now the pooris are ready for deep frying.
Heat a frying pan/kadai, add cooking oil for deep frying. The oil should be hot enough for deep frying pooris. Check it by dropping a small dough in to the oil. If it sizzles and comes up to the surface immediately, then it is right temperature for frying pooris.
Slide rolled out poori in to the hot oil, after few seconds slightly press the poori using slotted ladle. It will puff up and just turn the poori to other side. Fry it till golden brown and remove it from oil. Drain it on paper tissue.
Continue the same process till all the rolled pooris are done.