Au Gratin Potatoes

• 4 Large Russet Potatoes sliced into 1/4th in slices
• 1 onion sliced into rings
• salt and pepper to taste
• 3 tablespoons butter
• 3 tablespoons all purpose flour
• 1/2 teaspoon of salt
• 2 cups milk
• 1 1/2 cups shredded cheddar cheese
• 1/2 cup crumbled bacon

Preheat your oven to 400 degrees and butter 1 quart baking dish.  

Layer potatoes then onions and bacon then top potatoes and salt and pepper each layer of potatoes to taste.

In sauce pan over medium heat melt butter mix in salt and flour stirring constantly for 1 minute.  Stir in milk and cook until the mixture has thickened.  Mix in cheese all at once and continue to stir until all cheese is melted about 90 seconds longer.  Pour mixture over potatoes and onions and cover with aluminum foil.  Bake for 1 1/2 hours in the preheated oven