Potatoes Dauphinoise—often confused with potatoes au gratin, though slightly different—has long been one of my favorite potato dishes to serve during the holidays.

If you love a good steak dinner, this recipe brings together two classics into one irresistible plate — Steak au Poivre meets Steak Frites with peppercorn sauce!

For this appetizer, when you bite into the warm, flaky puff pastry, you are met with melty, sharp gruyere and sautéed mushrooms with fresh thyme and sherry. It’s a great flavor combination in each bite and these are so elegant, yet easy to put together!