1. Wash and clean the fillet of fish with a dry cloth. Rub the olive oil on the fish with a brush or with your hand. Rub it well on both sides of the fish and put fish on aluminum foil.
2. Layer on top with onion & two lemons slices and sprinkle salt, black pepper and fennel seeds. Wrap the foil around the fish and put it on a hot barbeque grill and cook on high until both sides are cooked well.
3. Garnish with lemon slice and green fennel leaves and serve.
Note: Yield: 4 Servings, Preparation Time: 15 Minutes, Degree of Difficulty: Easy, Dish: Pakistani