Lemongrass salt fish pickle

Ingredients

• 300g threadfin/kurau fish - soaked for 10 mins, rinsed and cut into medium size cubes.
• 10 birds eye chillies (optional)
• oil and salt as needed
• 3 tbsp apple cider vinegar
• 1 tbsp brown sugar
• salt as needed
• 1/4 cup water
• To blend/grind
• 2 lemongrass
• 10 dried red chilles (or as per taste)
• 2 tbsp coriander seeds
• 1 tsp cumin seeds
• 1 tsp fennel seeds
• 8 shallots
• 1 inch ginger