3 tablespoons butter
1 small white or yellow onion, peeled and thinly sliced
4 large garlic cloves, minced
3 tablespoons all-purpose flour
4cups thinly sliced potatoes
1 1⁄2cups milk
1dash cayenne pepper
1cup grated sharp cheddar cheese
1⁄2cup grated cheese, to sprinkle on top
In a small saucepan, melt butter and blend in flour.
Let sit for a minute.
Add all of the cold milk, stirring with a whisk.
Season with salt and cayenne.
Cook sauce on low until smooth and boiling, stirring occasionally with a whisk.
Reduce heat and stir in cheese.
Place a half of the sliced potatoes in a lightly greased one-quart casserole dish.
Pour half of cheese sauce over potatoes.
Repeat with the second layer of potatoes and cheese sauce.
Sprinkle the remaining cheese on top.
Top with some paprika for color.
Bake uncovered for about 1 hour at 350°F.