Take pan
Heat oil in it
Add mustard seeds asafoetida.
Add onion and tomato puri
Saute untill it removes oil from edged of pan
Add red chilli turmeric powder and garam masala saute it again for 2 minutes.
Add water 1/2cup
Mix well add boiled potato and matar
Add salt and boil for 3 minutes
Garnish with coriander leaves.
Serve hot .