Tartiflette is a traditional French dish from the Savoie region. It is made with layers of sliced potatoes, bacon, onions, and Reblochon cheese. The dish is baked until the cheese is melted and bubbly, creating a rich and indulgent casserole. Tartiflette is a hearty and comforting dish that is perfect for cold winter nights or as a main course for a dinner party.