Even trade affected the development of Indian cuisines, she said adding 'In Madurai, the Chettinad cuisine has expensive spices like fennel, coriander, clove, cinnamon which reflected that people were wealthy and trade happened, O'Brien said. "In desert like Kutch, there was an extensive use of millet as it was locally grown and was fast to grow so the Kutchi cuisine developed with very limited ingredients which were easily available there," she said.