Seychelles fish curry

Name: Seychelles fish curry
Prep time: 30 min
Cook time: 30 min
Total time: 1 h
Cuisine: Asian, Indian
Ingredients: 2 tbsp coriander seeds; 2 tsp cumin seeds; 2 tsp black peppercorns; 1 tsp cardamom pods; 1 tsp cloves; small piece of cinnamon; 1 tsp ground chilli; 1 tsp grated nutmeg; 900g/2lb red snapper or monkfish; salt and freshly ground black pepper; 2 tbsp sunflower oil; 2 onions, chopped; 2 tbsp massalé; ½ tsp ground turmeric; 2 cloves garlic, chopped; small piece ginger, chopped; 3 tbsp tamarind water; leaves from 2 sprigs thyme; ½ tsp anise; 450ml/¾ pint fish stock or water