Celery peel, wash and roughly dice. Peel, wash and halve potatoes. Cook potatoes and celery in boiling salted water for about 25 minutes. Dab meat dry, season with salt and pepper.
Heat clarified butter in a large pan. Fry 4 steaks for about 6 minutes while turning. Remove and keep warm. Fry the rest of the meat in the same way.
Heat milk and butter. Drain potatoes and celery, add milk and butter mixture and mash everything with a potato masher, season with salt and pepper. Arrange steaks and mashed potatoes on plates, sprinkle with cress. Herb butter tastes good with it.