Begin by preparing the beef jus dipping sauce. In small saucepan over a medium heat on the stovetop (hob), melt the butter. When melted, add the flour. Stir for about 1 minute or until bubbling. Slowly whisk in the beef broth, and add the thyme and rosemary. Heat for 2-3 minutes, stirring continuously, until the sauce begins to thicken. Set aside and keep warm.