Two pounds firm fish, big chunks.
Half cup each: oil, chopped onions.
Quarter cup of chopped tomatoes.
One and a half cups of coconut milk.
Half dozen green peppers, slit and seeded.
Three TBS chilipaste.
One TBS ground coriander.
One Tsp. each: ground cumin, turmeric, sweet chili powder.
A lot of chopped ginger, only a little chopped garlic.
Half cup of weak tamarind water.
Osterize chili paste, spices, ginger, garlic, and tamarind water in the blender.
Brown the onions. Add tomatoes and masala, fry fiercely for two minutes. Add half the coconut milk and cook till oil separates. Put in the fish, green chilies, a few tablespoons of water, and a little more of the coconut milk. Cook five minutes. Pour in the last of the coconut milk, bring to a boil, and remove from heat. Serve with plain rice.
Note: this is the same recipe as on a blog I have neglected for a long time. No need to mention it further.