Weight Watchers Scalloped Potatoes

4 Points Plus per serving
Ingredients
1 spray cooking spray
1 Tbsp salted butter
1 medium sweet uncooked onion, thinly sliced
2 Tbsp all purpose flour
2 cups fat free milk
2 pounds uncooked Yukon gold potatoes, thinly sliced
1 cup low fat shredded cheddar cheese
1 tsp table salt
1/4 tsp black pepper

Instructions
Preheat oven to 375 degrees.  Coat a 2-quart covered baking dish with cooking spray.

Melt butter in a large pot over medium heat.  Add onion and cook, stirring occasionally, until onion begins to brown, about five minutes.  Stir in flour; add milk slowly, stirring.  Add potatoes and stir to mix.  Bring to a boil.  Stir in 3/4 cup of cheese, salt and pepper.

Pour mixture into prepared baking dish and level out surface.  Bake for 1 hour, uncovered.  Cover and bake until potatoes are fork-tender, about 20 minutes.

Change oven temperature to broil.  Sprinkle remaining cheese over potatoes.  Broil 6 inches from the heating element until the cheese is golden brown, about 1 to 2 minutes.  Allow to cool for 5 minutes before slicing into 8 pieces.