Ingredients

2 tablespoons butter2 tablespoons all-purpose flour3/4 teaspoon saltDash pepper1-1/3 cups 2% milk2 medium potatoes, peeled and thinly sliced2 tablespoons finely chopped onion1/4 cup shredded cheddar cheese

Preparation

In a small saucepan, melt butter. Stir in the flour, salt and pepper until smooth. Gradually stir in milk. Bring to a boil; cook and stir for 2 minutes or until thickened.

In a 1-qt. baking dish coated with cooking spray, layer half of the potatoes, onion and half of the sauce. Top with remaining potatoes and sauce.

Cover and bake at 375° for 30 minutes. Uncover; sprinkle with cheese. Bake 10-15 minutes longer or until potatoes are tender.