Clean and wash spring onions and cut into fine rings. Wash the fillet, dab dry and divide into 4 medallions.
Heat the oil in a coated pan. Fry the steaks for 2-3 minutes on each side. Season with salt and pepper and remove. Wrap in aluminium foil.
Sauté the spring onions, except for a few, in the hot frying fat. Stir in 200 ml water, apple juice and stock, bring to the boil. Add cream and mustard and simmer for 3-4 minutes. Add salt, pepper and.
1 pinch of sugar to taste.
Heat the fat in a frying pan. Fry the gnocchi in it while turning them golden brown. Serve with fillets and mustard sauce. Sprinkle with remaining spring onions.