Chop mango into equal pieces. No need to remove peel.
Grind coconut with green chilies with little water to make a smooth paste.
Boil it with 1 cup of water in a sauce pan for 3-4 minutes.
Now add coconut paste and buttermilk in the sauce pan. Mix well and cook it on low flame.
Now add salt to taste, turmeric powder, mix it well and remove from flame.
When mustard seeds splutter, add fenugreek seeds and curry leaves and fry for few seconds and add this to the curry.