Peel onions and cut them into fine rings. Clean and clean the mushrooms and cut them into thin slices
Heat 2 tablespoons of oil in a flat roasting pan. Fry the onions and mushrooms for 4-5 minutes while turning. Cover and cook for about 10 minutes, then simmer until the liquid has evaporated. Cut the gherkins into slices
Dab meat dry and cut into strips. Heat 2 tablespoons of oil in a frying pan in portions. Sauté the meat in the oil in portions, turning the meat well. Season with salt and pepper, remove
Dust the mushrooms with flour and sauté briefly. Deglaze with 400 ml water. Bring to the boil, stir in broth, sour cream, mustard, sugar and gherkins and simmer for about 3 minutes. Stir in meat and heat up briefly (do not boil!). Season with salt, pepper and 1 pinch of sugar. Rice tastes good with it