These steak sandwiches with brie are a delicious and indulgent twist on a classic sandwich. Tender slices of steak are cooked to perfection and paired with creamy brie cheese, caramelized onions, and a tangy dijon mustard. The combination of flavors and textures is simply irresistible. Whether you're serving these sandwiches for lunch or dinner, they are sure to be a crowd-pleaser.