Once you've tried homemade au gratin potatoes, you'll never reach for the boxed stuff again.

Ingredients

• 3 tablespoons butter
• 3 tablespoons all-purpose flour
• 1-1/2 teaspoons salt
• 1/8 teaspoon pepper
• 2 cups 2% milk
• 1 cup shredded cheddar cheese
• 5 cups thinly sliced peeled potatoes (about 6 medium)
• 1/2 cup chopped onion
• additional pepper, optional

Directions

1. 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. Add potatoes and onion.
2. Transfer to a greased 2-qt. baking dish. Cover and bake 1 hour. Uncover; bake 30-40 minutes or until the potatoes are tender. If desired, top with additional pepper.