Grind coriander, cumin and fennel seeds ina blender or mortar and pestle. Add finelychopped garlic and grated ginger and blend toa paste.
Sauté chopped onion for 10 minutes untilsoft. Add paste and chilies and sauté 1 minutemore. Add garam masala, turmeric, staranise, cinnamon, and cardamom pods. Stirto combine. Add tomatos and simmer for 10minutes allowing flavours to develop. Add saltor fish sauce to taste.
10 minutes before serving add 90% of coconut cream and simmer for 5 minutes. Add fish and simmer for a further 5 minutes until cooked through. Add lime juice, coriander, and remaining coconut cream. Bring to temperature and serve with a scattering of fresh coriander.