Take water in a sauce pan and bring it to boil. Add spinach and cook it for 5 mins untill it is completely wilted. Allow it to cool down and take it in a blender and make into a fine puree.
Now take flour in a bowl. Add salt and oil to it and mix well.
Add in the ground spinach slowly and mix well..Knead it well so that it forms a stiff dough. Apply few drops of oil over it so it wont dry up. Cover with a bowl and let it rest for 15 mins.
Divide the dough into equal portions and roll it into poori.
Heat oil for deep frying and fry this till it turns golden brown.