Cheesy Potatoes and Onions

Ingredients

• 0.3 cup butter 
• 0.3 cup flour all-purpose
• 3 cups warm milk 
• 1 large onion separated thinly sliced
• 0.8 teaspoon pepper divided
• 3 pounds potatoes peeled thinly sliced
• 6 ounce process american cheese 
• 0.8 teaspoon salt divided
• 4 ounces cheddar cheese shredded

Equipment

• sauce pan
• oven
• whisk
• baking pan

Directions

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.
3. 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.
4. 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.
5. Remove from heat; pour over potato mixture.
6. Bake at 400 for 35 minutes or until golden.
7. Let stand 10 minutes before serving.