Coat a 9 x 13-inch pan with cooking spray.
Slice potatoes and set aside.
In a large soup pot, melt butter on medium heat, then use a wire whisk to stir in flour.
Add salt and pepper, then slowly pour in half and half, still using wire whisk to ensure a smooth consistency with few lumps.
Allow sauce to heat up and gently simmer, then add the potatoes.
When sauce is just starting to boil, pour mixture into prepared pan. Sprinkle top with either Tony Chachere’s seasoning or paprika. (The creole seasoning adds a nice sprinkling of flavor, though the paprika will still give it an appealing color.)
Cover top with foil and bake for about 40 to 45 minutes, until potatoes are tender when pierced with a fork.
This is delicious with any kind of meat, or can even be prepared with diced ham for a complete meal.