Fry onion and garlic in butter/olive oil. Add other vegetables and fry for a bit.

Add tomatoes and tomato puree. Let simmer for a few minutes.

Add water/milk, fish stock and curry. Let simmer then add more spices to your liking. (Keep it rather strong as you have yet to add the cream)

Add white wine and cream. Let simmer for a bit then taste and add spices if necessary.

Add the fish in soup size bites 5-10 minutes before serving (depending on size).