1.Heat Olive Oil With Butter In A Skillet Over Medium Heat. Stir In The Garlic. Place Fish Fillets In The Skillet; Sprinkle The Fish With Salt And Pepper, And Cook For 90 Seconds. Turn The Fish; Season With Salt And Pepper, And Cook An Additional 90 Seconds. 2.Add The Mushrooms, Capers, And Wine. Cover, Reduce Heat, And Simmer Until The Fish Flakes Easily With A Fork And The Wine Is Reduced By Half, 6 To 7 Minutes. Remove The Cover, Pour In Lemon Juice, And Cook For One Minute.