Scalloped Potatoes with mayonnaise

5 large potatoes , peeled and thinly sliced 3/4 cup onion , chopped 3 tablespoons butter or 3 tablespoons margarine 1/4 cup flour 1 3/4 cups chicken broth 2[...]

6 tablespoons margarine 1/2 cup flour 2 large onions , chopped 1/2 cup mayonnaise 1/2 teaspoon salt 28 ounces chicken stock 9 -10 large idaho potatoes ,[...]

5 thinly sliced potatoes 2 tablespoons chopped onions 3 tablespoons butter 1/4 cup flour 1 (14 1/2 ounce) can chicken broth 1/4 cup mayonnaise 3/4 teaspoon[...]