My best friend from California recently came down for a visit and we had the best time cooking, eating, and trying out new restaurants. My friend is a major foodie like me and is a great cook. During her stay, she was gracious enough to teach me how to make her easy potato au gratin. She got this recipe from her co-worker who is originally from Switzerland, so this recipe is French inspired. This is probably the simplest recipe for potato au gratin and I am obsessed with it. A few years ago, ...