Ingredients
- 6 cups thinly sliced potatoes (about 1/2 of a 5 lb bag)
- 4 tbsp butter
- 4 tbsp flour
- 3 cups milk or half and half
- 1½ tsp salt (or more to taste)
- 1/8 tsp black pepper, or dash of cayenne pepper
- 1/2 small onion, finely chopped (optional)
- 4 slices American or other cheese, optional
- Sauté the onion in olive oil or butter. Season with salt.
- Melt butter in saucepan. Add flour and whisk, cooking the flour for 1 minute. Add the milk, salt and pepper. Bring to a gentle boil, whisking The sauce often. When it thickens, lower the heat and add the onions and cheese.
- Spray an 8 x 8 baking dish with cooking spray. Add half of the sliced potatoes. Pour half of the sauce over the potatoes, then add the rest of them. Pour the rest of the sauce on top. Top with French fried onions or grated cheese if desired.
- Bake at 350°F for 1 hour and 25 minutes or until potatoes are tender and done.
