Peel and wash the potatoes and cook them in boiling salted water for about 20 minutes. In the meantime clean, peel and cut kohlrabi and carrots into sticks. Wash the meat, dab dry and cut into strips.
Fry in hot oil until crispy golden brown. Season with salt and pepper and remove from the pan. Fry the vegetable strips in the frying fat for 8-10 minutes, turning. Add the meat again and warm it up. Wash parsley, dab dry and chop.
Stir parsley and sour cream into the shredded meat. Do not bring to the boil again! Season to taste again. Drain the potatoes. Arrange on a plate with the cut-ups.