In a blender, blend large red chili, garlic, 15 g fresh turmeric, shallots, ikan bilis and belacan until smooth. If mixture is too dry, you can use vegetable oil to help you achieve a smooth consistency.
In a pot on medium heat, fry blended paste for 5 minutes until fragrant.
You can adjust the spiciness level of this dish by adding or removing the amount of large red chili.
To the same pot, add in pineapple slices, 15 g fresh turmeric, soaked tamarind paste and 400 ml water. Bring to a boiland let it simmer for 10 minutes.
Add fish to the pot and let it cook for 6 minutes on each side until completely cooked through.
Transfer ikan kerisi tumis asam onto serving plate or dish and serve hot.