Ingredients:
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- cooking spray, 1 spray
- 1 tablespoon butter
- 1 medium onion, thinly sliced
- 2 tablespoons all-purpose flour
- 2 cups skim milk
- 2 lbs yukon gold potatoes, thinly sliced
- 1 cup shredded low-fat cheddar cheese
- 1 teaspoon table salt
- 1/4 teaspoon black pepperChange Measurements: US | Metric
Directions:
 Prep Time: 20 mins
Total Time: 2 hrs
- 1 Preheat oven to 375°F Coat a 2-quart covered baking dish with cooking spray.
- 2 Melt butter in a large pot over medium heat. Add onion and cook, stirring occasionally, until onion begins to brown, about 5 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.
- 3 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 more.
- 4 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.
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Read more: http://healthy.food.com/recipe/ww-au-gratin-potatoes-294143#ixzz1BkeHi0G0