Ingredients
* 1/4 cup chopped onion
* 2 tablespoons butter
* 2 tablespoons flour
* 1 1/4 cups milk
* 1 cup grated cheddar cheese
* salt and pepper
* 2 potatoes, peeled and thinly sliced, not rinsed
Directions
1. Preheat oven to 350°F Fry the onion in butter until soft, add flour and whisk in with butter for 2 minutes.
2.Then whisk in the milk and cook (on medium heat) until thick and bubbly.
3.Remove from heat and add 3/4 cup of cheese, stirring until melted; season with salt and pepper.
4.Layer half of potatoes in a small baking dish and sprinkle with salt and pepper. Cover with half of sauce.
5.Layer remaining potato slices on top of sauce and season. Top with remaining sauce and sprinkle with remaining cheese.
6.Bake, covered, for an hour and a half. Mine takes a long time to cook through and I really try to make thin slices of potato!
I suggest having enough ingredients on hand to make a double batch of the cheese sauce. It really depends on how big your potatoes and casserole is going to be.
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