Step 1

Heat the oil in a wide, lidded frying pan, then soften the onion for 5 mins. Increase the heat a little, stir in the ginger, garlic, shrimp paste, chilli and lemongrass, and cook for 2 mins. Add the curry powder and sugar, and keep stirring. When the sugar starts to melt and everything starts to clump together, add the coriander stems, coconut milk and 2 tbsp water, then bring to a simmer.

Step 2

Add the fish to the sauce, tuck the prawns in here and there, then squeeze over half the lime. Pop on the lid and simmer for 5 mins more or until the hake is just cooked and flaking, and the prawns are pink through. Taste for seasoning, adding a squeeze more lime to the sauce if you like. Scatter over the coriander leaves and serve with rice.