This elegant dish takes inspiration from the classic Beef Wellington but replaces the beef with salmon. The salmon fillet is seasoned with herbs and spices, then wrapped in puff pastry along with a layer of sautéed mushrooms and spinach. The pastry is then baked until golden and flaky, resulting in a visually stunning and delicious dish. The combination of the buttery puff pastry, flavorful salmon, and earthy mushrooms creates a harmonious blend of flavors. Serve this Salmon Wellington with a side of roasted vegetables or a creamy dill sauce for a truly indulgent meal.