Sharp Cheddar Scalloped Potatoes

Ingredients

• 1/4 cup butter, cubed
• 1/3 cup flour
• 3/4 teaspoon salt
• 1/2 teaspoon ground mustard
• 1/2 teaspoon white pepper
• 2 cups half & half
• 1 1/2 cups shredded sharp white cheddar
• 1 1/2 cups shredded sharp orange cheddar
• 6 cups thinly sliced peeled Yukon Gold potatoes
• 1 large onion, diced

Directions

1. Preheat oven to 350 degrees.
2. In a large saucepan heat butter over medium heat. Stir in flour, salt, ground mustard and pepper until blended.  Cook and stir for 3 minutes or until lightly browned.
3. Gradually whisk in cream. Bring to a boil, stirring constantly.  Cook and stir 1-2 minutes or until thickened.  Remove from heat.
4. In a small bowl combine both cheeses. Layer a third of the potatoes, a third of the onions and ¾ cup of the cheese mixture in a 4-quart baker.  Repeat layering two more times.
5. Pour remaining sauce all over the top.  Sprinkle with remaining cheese.
6. Loosely cover with foil and bake for 45 minutes. Remove foil and bake for another 25-30 minutes or until potatoes are tender and the top is lightly browned.  Serve hot.