Au Gratin Potatoes
3 tablespoons butter
3 tablespoons all-purpose flour
1 1/2 teaspoons salt
1/4 teaspoon pepper
2 cups 2% milk
1 cup (4 ounces) shredded gruyere
5 cups thinly sliced peeled potatoes (about 6 medium)
Preheat oven to 350°. In a large saucepan, melt butter over low heat. Stir in flour, salt and pepper until smooth.
Gradually add milk. Bring to a boil; cook and stir 2 minutes or until thickened. Remove from heat; stir in cheese until melted and then add the potatoes.
Transfer to a baking dish. Cover and bake 1 hour. Uncover; bake 30-40 minutes or until the potatoes are tender and have some color.