=== Potatoes Au Gratin (potatoes already cooked)

Potatoes au gratin recipe is finished under the broiler.

3 cups diced cooked potatoes
6 tablespoons butter or margarine
3 tablespoons flour
1 1/2 cups milk
1 cup shredded Cheddar cheese
salt and pepper
1 cup soft bread crumbs

Potatoes au gratin recipe.
Place potatoes in a shallow, broilerproof baking dish. In a saucepan over medium-low 
heat, melt 6 tablespoons butter. Remove 3 tablespoons of butter to a cup or bowl; set 

To the remaining 3 tablespoons of butter in the saucepan, add flour. Stir to 
blend well; gradually stir in milk. Continue cooking, stirring constantly, 
until sauce is thick and smooth. Add cheese and continue stirring until cheese 
is melted. Pour sauce over potatoes in baking dish; mix gently. Place bread 
crumbs in a bowl; drizzle with remaining 3 tablespoons melted butter; toss to 
coat. Sprinkle buttered bread crumbs evenly over potatoes. Bake potatoes 
au gratin at 400 for about 15 minutes to heat through, then broil until 
golden brown. 
Recipe for potatoes au gratin serves 4. 

=== Creamy Au Gratin Potatoes (with raw potatoes)
4 russet potatoes, sliced into 1/4 inch slices 
1 onion, sliced into rings 
salt and pepper to taste 
3 tablespoons butter 
3 tablespoons all-purpose flour 
1/2 teaspoon salt 
2 cups milk 
1 1/2 cups shredded Cheddar cheese 
Preheat oven to 400 degrees F (200 degrees C). Butter a 1 quart casserole 
dish. Layer 1/2 of the potatoes into bottom of the prepared casserole dish. 
Top with the onion slices, and add the remaining potatoes. Season with salt 
and pepper to taste. In a medium-size saucepan, melt butter over medium heat. 
Mix in the flour and salt, and stir constantly with a whisk for one minute. 
Stir in milk. Cook until mixture has thickened. Stir in cheese all at once, 
and continue stirring until melted, about 30 to 60 seconds. Pour cheese over 
the potatoes, and cover the dish with aluminum foil. 
Bake 1 1/2 hours in the preheated oven.