Pat the fish fillets dry and season on both sides with salt and pepper to taste. Add the fish fillets to the marinade, turn to coat, and marinate at room temperature for 15 minutes. Flip the fish and marinate for 15 minutes more.☞ TESTER TIP: For a more pronounced flavor, marinate the fish for 25 minutes on each side—but no longer than that or the acid in the citrus will start to "cook" the fish.