Preheat oven to 400°. In a shallow bowl, mix lemon juice and butter. In a separate shallow bowl, mix flour and seasonings. Dip fillets in lemon juice mixture, then in flour mixture to coat both sides; shake off excess., Place in a 13x9-in. baking dish coated with cooking spray. Drizzle with remaining lemon juice mixture. Bake 12-15 minutes or until fish just begins to flake easily with a fork. Mix parsley and lemon zest; sprinkle over fish.