Trim the spring onions and finely slice with the chilli, then peel and matchstick the ginger.
Put a 25cm shallow casserole pan on a medium heat with 1 tablespoon of oil, the spring onions, chilli, ginger, curry leaves and all the spices. Stir and fry for 5 minutes, or until lightly golden.
Meanwhile, remove the prawn heads and stir them into the pan as you go for serious added flavour, then add the rice and 1.2 litres of boiling water.
Simmer for 10 minutes while you peel the rest of the prawns (I leave the tails on), then use a small sharp knife to lightly score down the backs and devein them, which will mean they butterfly as they cook. Keep in the fridge until needed.
Halve and add the tomatoes to the pan, then cover with the coconut milk. Simmer for 20 minutes, then cut the fish in half across the middle and place in the pan for a further 10 minutes, or until the fish and rice are cooked through, adding the prawns for the last 5 minutes.
Pick out the prawn heads, squeeze out all the lovely juices, then discard, and loosen the stew with a little boiling water, if needed.
Have a taste, and season to perfection with sea salt, black pepper and lemon juice.
One-by-one, puff up your dry poppadoms in the microwave for around 30 seconds each and serve with the stew.