I have found this recipe to work with most fish. I have used it with grouper, red fish and mahi.
Preheat oven to 400 degrees
Spray pan or light coat of olive oil
Lightly coat fish with olive oil or spray
Season with anything you like, salt, pepper, herbs (i like rosemary and dill)
Cook for for about 12-15 minutes depending on thickness.
Fish should be flaky