Simple, Classic Potato Gratin is the perfect accompaniment to my Citrus Chipotle Ham. Layers of potato, creamy cheese and a caramelized top. This Classic Potato Gratin can be tailored to fit your taste. I love adding fresh picked thyme leaves for an ultra-classic French taste.  With my Citrus Chipotle Ham, I like to keep it simple because of the intense glaze on the ham.  The recipe calls for two cups cheese and this time I used Monterrey Jack cheese because it’s mild and creamy. You can easily swap the onion for fennel, or use pepper jack cheese for a Mexican take. The possibilities are endless. But, for me, my friends,…