Step 1

Spray a 13x9 baking dish with cooking spray and preheat oven to 350 degrees.

Step 2

Shred cheese then set aside 1 cup for top of potatoes.

Step 3

Cut potatoes into very thin slices (between 1/8 and 1/4 inch). Add one layer of potato slices to the bottom of the baking dish. Sprinkle potatoes generously with salt and pepper.

Step 4

Sprinkle 1/3 cup shredded cheese over potatoes. Repeat this process twice.

Step 5

Add one more layer of potatoes, salt and pepper then top with remaining cup of cheese.

Step 6

Combine condensed cheddar soup, evaporated milk, half and half and onion powder then whisk until smooth. Pour mixture over potatoes and cheese.

Step 7

Cover dish with aluminum foil then bake at 400 degrees for 30 minutes.

Step 8

Remove foil, reduce temperature to 350 degrees then continue baking an additional 30-45 minutes or until potatoes are tender and dish is light golden brown and bubbly.

Step 9

Garnish with fresh chopped parsley if desired.