Swiss steak has been around since the early 1900s. It is typically made with sliced round steak or rump, baked with tomatoes, onions, peppers, and seasonings. This version is cooked in the crock pot with tomatoes and condensed soup. It isn't necessary to brown the beef before adding it to the slow cooker, but browning does add extra flavor. The simple combination of beef steak, vegetables, and seasonings is cooked to perfection in the slow cooker.