Chinese style steam Asam fish

Marinate siakap fish with
Pepper powder 1teaspoon
Salt 1teaspoon
Fish oil 1 tebalspoon

For Asam sauce
2 lemongrass
2 pcs galangal
4 garlic
2 pcs  ginger
2 red chilli
6 dry chilli
1 tbsp dry prawns
2 big onion
2 tbsp fish curry powder
1/2 pineapple
1/2  tomato
5 ladies fingers
1/2 cup tamarind juice
1 tbsp sugar
Salt to taste
2 tbsp cooking oil