Preheat oven to “broil”.
Coat a 9- x 13-inch METAL baking pan with 1 tablespoon of olive oil.
If using a whole fish, wash it and pat it dry then cut several 1/4-inch slits across the body; season with salt and pepper to taste.
In a small bowl, combine rosemary, fennel seeds, parsley, remaining 3 tablespoons of olive oil and the garlic. Fill the slits in the fish with this herb mixture. If using fillets, rub the mixture into the tops.
Broil for 10 minutes or until fish flakes easily when tested with a fork.