Potatoes And Leeks Au Gratin

• 4 Tablespoons Butter, Divided
• 3 Tablespoons Flour
• 1 teaspoon Salt
• 1/4 teaspoons Pepper
• 2-1/2 cups Milk
• 1 cup Cheddar Cheese, Shredded, Divided
• 1 cup Parmesan Cheese, Shaved, Divided
• 6 Medium Potatoes, Sliced Thin (about 4 Cups)
• 2 Large Leeks, Whites Only, Sliced Thin

1. Heat oven to 350u0b0F.
2. In a large skillet over medium heat, melt 3 tablespoons butter. Add flour and whisk until smooth. Stir in 1 teaspoon salt and pepper. Add milk gradually, whisking well after each addition. Remove from heat.
3. Add 1/2 cup each cheddar and Parmesan cheeses. Stir until melted.
4. Grease a 2-quart baking dish (I sprayed with nonstick spray). Layer potatoes and leeks in two layers, topping each with about 1/3 of the sauce. Top with remaining potatoes, leeks, and sauce. Dot with remaining 1 tablespoon butter.
5. Cover and bake for about 45 minutes. Uncover and bake 45-55 minutes longer, until potatoes are tender. During the last 5 minutes of bake time, sprinkle the remaining cheeses on top.
6. Let set about 10 minutes and serve.

butter, flour, salt, ubc, milk, cheddar cheese, parmesan cheese, potatoes, leeks

Taken from tastykitchen.com/recipes/sidedishes/potatoes-and-leeks-au-gratin/ (may not work)