Wash and slit chillies from the middle from one side so that they are attached from other side and you can stuff them. Keep aside.
To make the stuffing, mix all dried ingredients for stuffing.
Now to fill the stuffing take small amount of stuffing mixture and fill it in the chillies, stuff all chillies likewise.
Heat mustard oil in a pan and one by one add all chillies carefully, cover immediately as chili splutter and sometimes they burst which may cause some heat burns.
Cook for 2-3 minutes on slow heat, remove cover and stir them once and cook for 3-4 minutes more , when brown spots start appearing add balsamic reduction mix well and remove from heat.