How to Make It
In large, deep skillet, heat the oil. Add the onion, ginger and garlic and cook over moderate heat, stirring frequently, until lightly browned, about 6 minutes. Add the cayenne, turmeric and coriander and cook for 1 minute, stirring. Whisk in the yogurt, then add the cream, garam masala and saffron and bring to a boil. Reduce the heat and simmer the sauce until slightly thickened, about 10 minutes. Season with salt.
Add the halibut to the sauce and turn to coat. Cook over moderate heat, turning once, until the fish is cooked through, about 10 minutes. Serve with basmati rice and warm naan.