1.Bring A Large Pot Of Salted Water To A Boil. Add Potatoes And Cook Until Tender But Still Firm, About 15 Minutes. Drain And Mash. 2.Melt Butter In A Large Skillet Over Medium-High Heat. Saute Tomatoes, Onion, Chile Sauce, Green Onion, Garlic Powder, Salt And Pepper. Stir In Potatoes And Cook Until Heated Through. 3.Spoon Potato Mixture Into A 2 Quart Casserole Dish And Sprinkle With Cheese. Serve When The Cheese Has Melted.