Take a cooking vessel, add oil and heat it on low flame.
Add the blended masala paste into it.
give a mix and keep stirring the masala to avoid burning.
add salt as per taste, red chilli powder, turmeric powder, ginger garlic paste.
give a mix and cook the masala on low flame for 5-10 minutes and stir in between.
add the tamarind extracted pulp and adjust the sourness as per requirement.
give a stir and check the salt and add more as per requirement.
add the stir fried fish pieces into the curry.
add some fresh curry leaves.
let the curry boil well.
stir delicately in between.
cook for 5 minutes on sim flame.
switch off the flame.
serve the curry with rice.