Mash the boiled potatoes, add rice flour and oil in it mix well make fine dough of it
Fill this dough in the sev making mashin,heat oil in the karai and fry sev like a nest one by one on medium flame to make it crispy
Now heat oil in a separate Pan add onions Saute for 1 minute then add other vegetables and sauté for 2 minutes
Mix 1.5 cup of water in the cornflour and keep it aside
Now add ketchup,chilli sauce, vinegar, salt, pepper schezwan sauce,and corn flour paste in the pan and stir well.
Stir for 3 to 4 minutes and switch off the flame
Place the sev in the center and spread the hot choupsey over it.