1.Melt Butter With Olive Oil In A Large Skillet Over Medium Heat. Cook And Stir Green Onions, Garlic, Parsley, Salt, And Pepper In The Hot Oil Until Vegetables Are Softened, About 2 Minutes. Stir Lemon Juice And 1/4 Cup Brown Sugar Into Green Onion Mixture, Stirring Constantly Until Sugar Is Dissolved, About 2 Minutes More. 2.Place Catfish Fillets Into The Skillet; Cook Until Catfish Easily Flakes With A Fork, 3 To 4 Minutes Per Side. Transfer Catfish To A Plate And Pour Remaining Lemon Juice Sauce On Top. Sprinkle With Remaining Brown Sugar.