Ingredients:
4 cups thinly sliced potatoes
3 tbsp butter
1 1⁄2 cups milk
3 tbsp all-purpose flour
1 cup grated sharp cheddar cheese
1⁄2 cup grated cheese (cheddar or Gruyere) for topping
Salt to taste
Optional: 1/2 cup sliced green onions, pinch of cayenne pepper
Instructions:
Preheat your oven to 375°F (190°C) and grease a baking dish.
Melt butter in a saucepan over medium heat. Whisk in flour and cook for 1-2 minutes until golden.
Gradually add milk, stirring continuously, and simmer until the sauce thickens.
Off the heat, stir in sharp cheddar cheese, salt, and optional cayenne pepper until smooth.
Arrange half of the sliced potatoes in the baking dish. Pour half of the cheese sauce over them.
Layer the remaining potatoes and top with the rest of the sauce.
Sprinkle the top with the extra grated cheese.
Cover with foil and bake for 45 minutes, then uncover and bake for an additional 15 20 minutes until golden and crispy
