Rinse cooled beef fillet, dry with kitchen paper and cut into strips.
Heat clarified butter in a large frying pan. Roast beef fillet in it for 6 minutes, turning. Remove from frying pan and keep warm.
Peel onion, clean leek and rinse when cool. Cut both into rings. Peel garlic and finely dice.
Roast onion rings and garlic in roast stock, turning until golden. Pour beef broth, cook to your liking. Season lightly with salt and season with pepper. Add caraway marjoram and leek rings. Stew for 10 minutes until tender.
Season the meat with salt and season with pepper, add to the onions form and heat. Serve in a dish.
Serve with: mixed leaf salad
Tip: Instead of clarified butter, you can also use butter in most cases.