In a greased 8-in. square baking dish, layer half of the potatoes, onion, bacon and cheese. Repeat layers.
In a small bowl, whisk the egg, milk and seasoned salt; pour over potato mixture. Cover and bake at 350° for 30 minutes. Uncover; bake 5-10 minutes longer or until a knife inserted near the center comes out clean. Yield: 8 servings.