How do you cook Wellington style?

To cook a Wellington-style dish, start by searing a seasoned beef fillet in a hot pan until browned. Next, prepare a duxelles by finely chopping mushrooms, shallots, and herbs, then sautéing them until moisture evaporates. Wrap the beef in the mushroom mixture and then in prosciutto or ham, before encasing everything in puff pastry. Bake in a preheated oven until the pastry is golden brown and the beef reaches your desired doneness.