Complex sentence: The difference with the Dum biryani is that the Mauritians added fried potatoes and roasted cumins to the gravy in replacement of kashmiri chilli generally used in the Hyderabadi version.
Split into simpler sentences: The difference with the Dum biryani is that the Mauritians add fried potatoes and roasted cumin to the gravy in. This replaces the Kashmiri chilli generally used in the Hyderabadi version.