I might not have any better luck but let me give it a try. If it works I'll let you know what I did, otherwise "never mind. 
TWICE-COOKED MASHED POTATOES
1/2 cup chopped onion
1/2 cup chopped green pepper
1 tbsp vegetable oil
4 cups mashed potatoes (prepared with milk and butter)
1 cup shredded cheddar cheese, divided
1/4 cup crumbled cooked bacon
1 tsp salt 1/2 tsp pepper
In a small skillet, saute onion and green pepper in oil until tender.
In a large bowl, combine the onion mixture, mashed potatoes, 1/2 cup cheese, bacon, salt and pepper. Spoon into a greased 2-qt baking dish. Sprinkle with remaining cheese. Bake, uncovered, at 350° for 20-25 minutes or until cheese is melted. Yield: 6 servings