Wash potatoes thoroughly and cook in boiling water for 35-40 minutes. Meanwhile grate cheese and mix with sour cream. Season with salt and pepper. Drain the potatoes and let them cool down briefly. Carve each potato crosswise with a knife
Place the potatoes on a baking tray lined with baking paper. Spread the sour cream cheese mixture on top. Bake in the preheated oven (electric range: 225 °C/ convection oven: 200 °C/ gas: level 4) for 12-15 minutes
In the meantime dab meat dry and cut into strips. Heat the oil in a pan and fry the meat for 2-3 minutes while turning. Deglaze with sauce, bring to the boil and remove from the heat. Remove potatoes from the oven, spread meat on top