Scalloped Potatoes with seasoning

9 medium potatoes 1 -1 1/2 onion , thinly sliced 1 -1 1/2 teaspoon salt , seasoning salt 1/8 teaspoon pepper , couple grinds per layer 2 tablespoons flour ,[...]

6 -8 medium white potatoes , sliced thin (we use Russets) 4 tablespoons all-purpose flour black pepper (about 2 tsp.) 1 1/2 teaspoons onion salt (or to taste)[...]

4 cups thinly sliced potatoes (about 4-5 med. spuds) 3 tablespoons butter 1/2 an onion , finely diced 1 (10 ounce) can cream of chicken soup (or mushroom) 1/4[...]