Boil water in a cooking pot. Add the tamarind.Cover and continue to boil in medium heat for 40 minutes. Let it cool down.
Using a sieve, strain the boiled tamarind towards a clean cooking pot.
Boil the liquid and then add tomato, onion and miso. Cover and cook for 15 minutes.
Add the fish, daikon radish, okra, and peppers. Cover and cook for 12 to 15 minutes in low to medium heat.
Pour-in the fish sauce. Stir.
Add the mustard leaves.Cover and cook for 3 to 5 minutes.
Transfer to a serving bowl. Serve.
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