Peel onion and chop finely. Clean coriander leaves, wash well and then chop finely. Boil potatoes, peel and cut into bite sized pieces. Wash, remove stem and finely chop green chillies.
Combine puffed rice, onion, roasted chana dal, peanuts, potatoes, green chillies, half of the sev and toss well. Add four crushed puris and mix. Add salt to taste. Add the three chutneys as per your taste and mix well. Add lemon juice and mix.
Garnish with chopped coriander leaves and the remaining sev. Serve immediately with remaining puris to eat with.