Preheat the oven to 375 degrees.
Set aside a baking dish large enough to fit the fish.
Sprinkle the fish with the salt and pepper and place in the baking dish.
Drizzle with the butter or oil.
Add enough water to almost cover the fish.
Place in the oven and poach, basting occasionally, until tender, about 50 minutes.
Transfer the fish to a serving platter and drizzle with the pomegranate sauce.
Garnish with the pomegranate seeds or parsley.
This is frequently served with fried eggplant slices.
SAUCE: Cut the fruit in half.
Squeeze the juice into a strainer and discard the hard white kernels.
Boil the pomegranate juice until reduced almost by half.
Add the onion, basil, coriander, and garlic and let cool.
Ready in 1 hour.