Parmesan-Crusted Au Gratin Potatoes and Onion

Description Potatoes and onions mixed with a creamy cheese sauce and baked with a crispy cheese topping. Ingredients 4 pounds russet potatoes, cut into 1/4-inch slices salt and ground black pepper to taste 6 tablespoons butter 6 tablespoons all-purpose flour 1 ½ cups whole milk 1 cup heavy whipping cream 2 ½ cups shredded mild Cheddar cheese … Read more