Heat oil in a pan,add chopped onion,green chillies and butter saute for a minute.add onion,ginger,garlic, chilli paste saute for a minute on a low flame.
Add chopped tomato saute 2 minutes until turn transparet.now add red chilli,cumin,coriander powder,tomato sauce,fresh cream and salt saute for a minute.add mashed potato mix everything well.add boiled chopped eggs mix well eveything and add maggi masala stire well for a minute.now stuffing is ready.
Take a chapati spread tomato sauce.now add the stuffing the middle of the roll, add onion slices now roll it and join two edges and pin them up using a toothpick so that the rolls stay intact.