One school of thought has it that the word “curry” is an anglicized pronunciation of the yogurt- or buttermilk-based dish called kadhi. Kadhis have been in existence all around the Indian subcontinent for eons, and they have a reputation as a cure for digestive ailments: a scoop of delicately spiced kadhi over a mound of hot white rice will do the trick. This version, from the northwestern state of Gujarat, uses thick slices of okra fried in ghee and simmered until tender in s