This is a very easy casserole using prepackaged ingredients. The Hash Browns I use are about 1/2 inch cubes, not shredded potatoes. Don't thaw them before mixing.
- Preheat the oven to 300 degrees, and grease a 9x13 glass baking dish.
- Mix the potatoes, onion flakes, sour cream, soup, and cheese in a mixing bowl, and spoon it into the baking dish. Spread out with a spoon or a spatula, but don't pack the mixture down.
- Sprinkle the top with seasoning salt.
- Bake at 300 degrees, uncovered, for 2 hours.