French Onion Potato Casserole 🧅🥔 Gratin de pommes de terre à l'oignon français

French-style potato and onion gratin—perfectly golden-brown from the oven, featuring a light béchamel sauce and a wonderfully melt-in-your-mouth texture! 🧅 A true classic of home-style cooking, resulting in a generous, creamy, and flavourful homemade gratin. 🍂 A comforting dish that’s always a welcome sight on the table during autumn and winter. An economical recipe, perfect for a family dinner or as a side for roasted meat. ✨ Enjoy!

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