Boil potato , remove skin , mash potato and keep it aside .
Cook green peas and set aside.
Heat 2 tablespoon of oil in a deep pan , add mustard seeds ,chana dal , urad dal and curry leaves.
Once dal turns golden brown , add sliced onions , green chillies , turmeric powder and saute till onion turns translucent.
Add mashed potatoes , green peas , salt , 1 teaspoon of lime juice and mix well.
Finally add in chopped coriander leaves , mix well and set aside.