2poundsYukon gold potatoes, peeled and thinly sliced
½mediumOnion, diced finely
2cloves Garlic, minced
1cupSharp White Cheddar Cheese, shredded
¼cupGrana Padano Cheese, shredded
Fresh Green Onions, chopped (optional, for garnish)
2tablespoonsAll-Purpose Flour
2tablespoonsUnsalted Butter
1½cupsWhole Milk
¼teaspoon Ground Black Pepper, or to taste
½teaspoon Salt
Instructions
Preheat the oven to 375 F and lightly grease a 9 x 9-inch baking dish with butter.
Layer the sliced potatoes in the baking dish. You can stack them vertically in rows or place them atop one another.
Melt butter in a large saucepan over medium heat.
Add onion and garlic and cook them until they turn soft and translucent. Whisk in all-purpose flour and cook until browned. This will take you about 30 seconds to 1 minute.
Gradually whisk in milk, and add salt and pepper.
Whisk the cheese sauce mixture for about 2-3 minutes until it begins to thicken. Turn down the heat to low and add both varieties of cheese. Keep stirring the mixture continuously until the cheese has melted to prevent it from burning.
Pour the cheese sauce on top of the potatoes, and cover the dish with aluminum foil.
Place the baking dish into the oven and bake for an hour. Remove the foil from the dish and continue to bake for 20-30 minutes or until the potatoes turn golden brown and tender and the sauce has thickened.
Garnish the creamy au gratin potatoes with freshly ground black pepper and chopped green onions (optional). Serve immediately.