direct roast onion on gas until it turns translucent from outside.
Take onion, coconut in a blender and make a paste.
Heat oil in a pan and add mustard seeds.
Add ginger garlic paste and saute.
Add onion paste and mix it . Cook until onion turns brown.
Blend tomato to smooth paste and cook
Add haldi , salt and wait until oil separates
Add red chilli powder and prick potato with fork and add it too. Cover with a lid
Add some water and then let it come to boil.
Garnish with coriander and serve.
