Preheat oven to 400 degrees F. Wash potatoes and set aside. Prepare a baking dish (I used 13'x9') with non stick cooking spray and set aside. Thinly slice potatoes set them aside.

For your cheese sauce melt butter in a sauce pan on medium heat. Whisk in flour once melted and whisk constantly until well combined and golden brown. Slowly add in half and half whisking and allowing to combined before adding more. Slowly add 2 cups shredded cheese in adding just small amounts at a time. Allowing cheese to melt and combine before adding more. Once everything is well combine you should have a thick cheese sauce. Season with salt and pepper.

Fill casserole dish with potatoes, pour on ½ cheese sauce, place more potatoes on top and the rest of the cheese sauce.. Cover with foil and bake for 40-50 minutes or until potatoes are tender. Remove foil and top with remaining ½ cup shredded cheese and bake for an addition 10-15 minutes.