Indian cooks transformed the recipe by incorporating fragrant local spices, herbs and regional ingredients. Over centuries, every region created its own identity, from the rich Awadhi biryani of Lucknow to the fiery Hyderabadi version and the lighter Kolkata biryani, famously known for its potato. Today, biryani is less a single recipe than an entire family of dishes, each reflecting the history and tastes of the place that adopted it.