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recipe : http://www.sharmisthadey.com/2014/10/kolkata-style-chicken-biryani/
Calcutta biryani is a great deal similar to the Lucknowi biryani because it came to the city with the deposed Awadhi nawab Wajid Ali Shah. However, it is a lot more subtle in taste because the royal khansamas of his kitchen had to make do with limited resources and therefore, they added potatoes and eggs to max out the volume in the absence of a lot of meat. The nawab’s relative poverty gave rise to what is now a dish in its own right – it’s unthinkable that Calcutta’s biryani would not have the wholesome potato and the egg!