A creamy, cheesy potato and onion layered version of the classic dish, potatoes au gratin.

Cheesy Potatoes and Onions

6 medium potatoes (3 pounds), peeled and thinly sliced
1 large onion, thinly sliced and separated into rings
1 (6-ounce) package process American cheese slices
3/4 teaspoon salt - divided use
3/4 teaspoon pepper - divided use
1 cup (4 ounces) shredded cheddar cheese
1/4 cup butter or margarine
1/4 cup all-purpose flour
3 cups warm milk

1. Cook potato in boiling water to cover 5 minutes; drain.
2. Layer one-third potato slices, one-third onion slices, and one-third cheese slices in a lightly greased 13- x 9-inch baking dish. Sprinkle with 1/4 teaspoon salt and 1/4 teaspoon pepper. Repeat layers twice with remaining potato, onion, cheese slices, salt, and pepper. Top with cheddar cheese.
3. Melt butter in a heavy saucepan over low heat; add flour, whisking until smooth. Cook, whisking constantly, 1 minute. Gradually whisk in milk until smooth. Remove from heat; pour over potato mixture.
4. Bake at 400°F (205°C) for 35 minutes or until golden. Let stand 10 minutes before serving.

Makes 10 to 12 servings.