A fragrant, gently spiced fish curry enriched with coconut milk and given a distinctive tang from tamarind. The sauce is light yet complex, combining sweet softened onions, ripe tomatoes, and warming spices.
Coat 800 g fish with the turmeric rub and a pinch of salt to taste, rubbing it across every piece. Cover and let stand while building the curry base.
Warm 67.5 g vegetable oil in a deep frying pan set over medium heat. Add 450 g sliced onion and fry for roughly 5 minutes, stirring regularly until pale golden.
Add the base spices and pastes along with a generous pinch of salt to taste. Sauté for 2 minutes to cook out the raw garlic and ginger.
Tumble in 480 g chopped tomato, the sauce chillies, and 15.6 g tamarind extract. Cook for about 5 minutes, stirring frequently, until the tomatoes collapse, the excess liquid boils away, and the sauce pulls together.
Pour 250 g water into the pan and bring the liquid to a rolling boil. Ease the seasoned fish into the simmering sauce, drop the heat to low, cover, and cook gently for 8–10 minutes until the fish is cooked through.
Remove the lid, pour in 127 g coconut milk, and swirl or stir gently without breaking the fish. Allow everything to simmer for 2 minutes before serving.
Steep a tiny pinch (0.1 g per 2 g turmeric) in 2 tbsp warm water; use to match the rich golden hue. Contributes an aristocratic, honeyed floral flavour rather than earthy bitterness.
Use 80% of the weight, finely shredded and browned slowly with a pinch of asafoetida. Replicates the bulk and natural sweetness in gravies without allium.
Use 50% of the weight and stir in near the end of cooking. Adds warmth and depth since it contains ground coriander, but introduces stronger spices like clove and cinnamon.
Use 40% to 50% of the fresh tomato weight mixed with a splash of water. Imparts a deeper red colour, thicker sauce, and slightly sweeter cooked flavour.
Use equal weight; simmer gently over low heat to prevent curdling. Imparts a comparable rich texture, though it adds dairy richness without any coconut fragrance.