1. Rub fish fillets with oil; sprinkle evenly with Greek seasoning. Top each fillet with 2 lemon slices.
2. Place a large piece of lightly greased heavy-duty aluminum foil over grill cooking grate. Arrange fish on foil.
3. Grill fillets, covered with grill lid, over medium-high heat (350° to 400°) 15 minutes or until fish flakes with a fork. Serve with Dot's Tartar Sauce.
Note: For testing purposes only, we used Cavender's All-Purpose Greek Seasoning.