Twice Baked Mashed Potatoes

This recipes comes from AllRecipes.com.

Twice Baked Mashed Potatoes
Serves 6 (Side Dishes)

Ingredients
½ cup chopped onion
½ cup chopped green pepper
1 tablespoon vegetable oil
4 cups mashed potatoes (prepared with milk and butter)
1 cup shredded Cheddar cheese, divided
¼ cup crumbled cooked bacon, optional
1 teaspoon salt
½ teaspoon pepper

Directions
In a small skillet, sauté onion and green pepper in oil until tender. In a large bowl, combine the onion mixture, mashed potatoes, ½ cup cheese, bacon (if desired), salt, and pepper. Spoon into a greased 2-quart baking dish. Sprinkle with remaining cheese. Bake, uncovered, at 350 degrees for 20 to 25 minutes or until cheese is melted.