Heat up a vessel or a pan.
Add shrimps, mango pieces, tomato, turmeric powder, chilly powder, 1/4 cup of water and salt to taste.
Allow it to boil.
:- Do not boil for more than 15 mins
b`coz if overcooked, the shrimps will become hard.
Grind together grated coconut and pearl onions.
Add the ground coconut into the pan or the vessel.
When it starts boiling, switch off the flame.
Heat coconut oil in a pan or a kadai.
Splutter mustard seeds and curry leaves.
Pour the above seasoning into the curry and mix well.