1. Prepare the prawns or fish
Pat the prawns or fish dry with kitchen paper and place in a bowl.
Sprinkle over the turmeric and turn gently until evenly coated. If using fish, keep the pieces fairly large so they hold their shape while cooking.
2. Lightly sear the prawns or fish
Heat 1 tablespoon of the oil in a large, wide pan over a medium-high heat.
Cook the prawns in batches for approximately 45 seconds on each side. If using fish, cook for approximately 1 minute on each side. The outside should take on a little colour, but the seafood should not be completely cooked at this stage.
Transfer carefully to a plate and set aside.
3. Cook the onion
Reduce the heat to medium and add the remaining oil to the pan.
Add the onion and cook for 8–10 minutes, stirring regularly, until soft and lightly golden. Add a small splash of water if the onion begins to catch.
4. Add the curry paste
Add Shemin’s Seafood Curry Paste with a splash of water.
Cook for 2–3 minutes, stirring regularly, until the paste is fragrant and thoroughly combined with the onion.
5. Make the coconut sauce
Pour in the coconut milk and 100ml of water, then add the sugar and green chillies, if using.
Stir everything together and bring slowly to a gentle simmer. Cook uncovered for approximately 8 minutes, stirring occasionally, until the sauce has thickened slightly.
Keep the heat gentle and do not allow the coconut milk to boil vigorously.
6. Finish cooking the prawns or fish
Return the prawns or fish to the pan along with any juices from the plate.
If using prawns, simmer gently for approximately 3 minutes, until they are pink, opaque and just cooked through.
If using fish, simmer gently for 4–6 minutes, depending on the thickness of the pieces, until opaque and easily flaked with a fork. Turn the fish carefully or spoon the sauce over it rather than stirring to prevent it from breaking apart.
7. Finish and serve
Stir in Shemin’s Garam Masala and most of the coriander.
Taste before adding any salt, as the curry paste is already seasoned. Finish with the remaining coriander and serve with steamed basmati or pilau rice and warm Shemin’s Indian Breads.