In a saucepan, combine tamarind paste, palm sugar, minced garlic, chopped chilies, and water.
Bring to a boil over medium heat, stirring frequently.
Reduce heat and let it simmer for about 10-15 minutes, or until slightly thickened.
Season with salt and soy sauce if desired. Set aside to cool.
In a mixing bowl, combine the minced fish, salt, white pepper, and sugar. Mix well.
Gradually add ice water while stirring to form a smooth mixture.
Add tapioca flour and all-purpose flour to the fish mixture. Stir until a smooth, pliable dough forms.
Divide the dough into small portions and shape them into round or oval patties. You can also shape them into small balls or use molds to create specific shapes if desired.
Heat vegetable oil in a deep pan or wok over medium heat.
Fry the pempek in batches, being careful not to overcrowd the pan. Fry until golden brown and cooked through, about 4-5 minutes per side.
Remove with a slotted spoon and drain on paper towels.
Slice the pempek into bite-sized pieces if desired.
Enjoy your meal!