This Savory Mushroom & Gruyère Puff Pastry Braid is a deliciously flaky and cheesy appetizer or main dish featuring a creamy filling of sautéed mushrooms, onions, cream cheese, Parmesan, and Gruyère wrapped in buttery puff pastry. The braid is brushed with egg wash and baked until golden brown, making it an impressive and flavorful treat perfect for gatherings or cozy meals.