Clean and peel the carrots. Peel and wash potatoes. Cut both into large cubes. Cook in boiling salted water for about 10 minutes. In the meantime wash and sort spinach. Peel and finely chop the onion.
Heat the fat. Sauté onion in it until transparent. Let the spinach collapse on top. Season with salt and pepper. Fold in prepared vegetables. Wash the meat and dab dry. Fry in hot oil while turning for about 5 minutes. Season with salt and pepper. For the sauce, bring the stock and milk to the boil. Stir in the sauce powder and let it boil for about 1 minute. Season to taste with salt and pepper.
Wash the meat and dab dry. Fry in hot oil while turning for about 5 minutes. Season with salt and pepper. For the sauce, bring the stock and milk to the boil. Stir in the sauce powder and let it boil for about 1 minute. Season to taste with salt and pepper. Arrange steaks and vegetables with the sauce. Serve garnished with parsley