Step 1

Pre-heat oven to 350°F (180°C).

Step 2

Peel and thinly slice the potatoes, place in a bowl of cold water and let sit while making the white sauce.

Step 3

In a medium/large pot on low/medium heat melt the butter, add the flour and salt and whisk until smooth.  Slowly add the milk, stirring constantly until thickens, approximately 2-3 minutes.  Remove from heat.

Step 4

Drain and towel dry the potato slices.

Step 5

Place 2-3 tablespoon of white sauce on the bottom of baking pan**, add 1/3-1/2 of the potatoes and 1/3 of the white sauce continue for another 1-2 levels.

Step 6

Sprinkle with Parmesan cheese if desired, and bake covered for 45 minutes, then uncover and bake for an additional 30 minutes.  Let sit 5 minutes before serving.  Sprinkle with chopped parsley if desired.  Enjoy!

Step 7

**I used a medium baking pan (10x7 inches / 26x17 centimeters) and made 3 levels, you could use a larger pan and make only 2 layers if desired.