Take a earthernware kadai or any pan and heat it up. Add coconut oil in it and let it heat up too.

Once it gets hot. Add the seasoning ingredients and let them sizzle for a min or so.

Add in onions and saute for 5 mins till they turn translucent and slightly golden.

Now add in the spice powders along with salt and let them bloom in the oil for 30 sec.

Throw in the tomatoes and let the cook for 5 mins till they turn mushy.

Now add in the tamarind pulp and some water(around2-3 cups) and bring it to a boil.

Now add in the fish pieces and let it cook covered for 15-20 mins.

Switch off the flame and serve with rice.