Kerala Fish Curry | Nigella's Recipes | Nigella Lawson

Ingredients

• 1¼ kilograms firm white fish
• salt
• 2 teaspoons turmeric
• 1 tablespoon vegetable oil
• 2 medium onions (halved and cut into fine half moons)
• 2 long red chillies
• 4 centimetres piece of fresh ginger
• 1 pinch of ground cumin
• 1 x 400 millilitres tin coconut milk
• 1 tablespoon tamarind (or 2 tablespoons concentrated)
• 1 tablespoon fish stock concentrate