Cook the sauce on low until smooth and boiling, stirring occasionally with a whisk.
Reduced heat and stir in cheese.
Place half the scalloped potatoes in a lightly greased single-serve casserole dish.
Pour half of the cheese sauce over the potatoes.
Repeat with the second layer of potatoes and cheese sauce.
Sprinkle the remaining cheese over the top.
Top with some red pepper flakes for color.
Bake uncovered for 1 hour at 350 degrees F.
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