Potatoes Anna - cooking recipe

Ingredients

1 large onion
6 medium potatoes (2 lb.)
4 medium sweet potatoes (2 lb.)
1/4 c. salad oil
margarine or butter
salt and pepper

Preparation

About 1 1/2 hours before serving, chop onion.
Peel and slice white and sweet potatoes, keeping in separate piles.
In a nonstick 10-inch skillet with ovensafe handle (or wrap with double thickness of heavy duty foil) in hot salad oil, cook onion until tender. With a slotted spoon, remove onion to bowl and set aside.
In remaining oil in skillet, arrange white potatoes in layer, overlapping slices.
Sprinkle sauteed onions over potatoes.
Dot with 2 tablespoons margarine or butter and sprinkle with 3/4 teaspoon salt and 1/4 teaspoon pepper.
Arrange sweet potato slices over white potato layer.
Dot with butter, salt and pepper, and add onion as with white potatoes.
Continue layers until potatoes run out.