Spray the pot of the slow cooker or if using a liner bag, spray the bag well. In a mixing bowl whisk together milk, evaporated milk, salt and pepper. Pour milk mixture into crock pot. Add cheese and uncooked macaroni. Stir gently to mix.

Turn slow cooker on low and cook 3-4 hours, or until the custard is set and the macaroni is tender. (Do not cook more than 4 hours, or the sides will begin to dry out.) Serve at once.