Preheat oven to 350. Microwave potatoes according to package directions. In a medium bowl, mash potatoes, evaporated milk and butter. Stir in remaining ingredients, except cheese and bacon, until well combined. Spread mixture in a 9x9" baking pan which has been coated with nonstick cooking spray. Top with cheese and bacon. Bake for 25 to 30 minutes or until heated through.