Heat oven to 350 degrees F. Coat 11x7 baking dish with nonstick cooking spray.
In a large bowl, whisk together soup, sour cream and salt. Stir in Hash Browns, onions, cheese and red peppers until well mixed. Spoon evenly into baking dish.
In a medium bowl, mix together breadcrumbs and butter. Sprinkle evenly on top of Hash Brown mixture.
Bake uncovered for about 30 minutes, or until hot and bubbly. Allow to rest for 5 minutes before serving.