AU GRATIN POTATOES

1 Tbsp butter or margarine
1 medium onion, thinly sliced
1 Tbsp flour
2 cups fat-free milk
2 lbs potatoes, thinly sliced
1 cup low-fat shredded cheddar cheese
1 tsp salt
1/4 tsp pepper

Heat oven to 375. Coat a 2 quart baking dish with cooking spray. 
Melt butter in a large pan 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, stir to mix. Bring to a boil. 
Stir in 3/4 cup of the cheese, salt and pepper. 
Pour mixture into the baking dish and spread out.
 Bake for 1 hour uncovered. 
Cover and bake until potatoes are fork tender, about 20 minutes more.
 Change oven temperature to broil. 
Sprinkle remaining cheese over potatoes and broil 6 inches from the heating element 
until the cheese is golden brown (about 1 - 2 minutes).
 Allow to cool for 5 minutes before serving.

8 servings, 3 POINTS each