Wash the meat, dab dry and cut into strips. Season meat with salt and pepper. Peel onions and cut into cubes. Clean, clean and halve the mushrooms. Drain gherkins and cut into strips.
Heat the oil in a pan and fry the meat for about 3 minutes. Add onion and mushrooms and fry for about 5 minutes. Dust with 1 tablespoon of flour. Deglaze with cream. Stir in mustard.
Finally, add the gherkins and let them boil down slightly for about 5 minutes. Peel, wash and coarsely grate the potatoes. Cook in boiling salted water for 3-4 minutes, rinse in cold water and drain.
Put the shredded meat in a casserole dish. Put potatoes in a bowl, mix with egg and 1 tablespoon of flour and season with salt and pepper. Spread the potatoes over the shredded meat. Bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 40 minutes until golden brown.
Pick salad, halved cherry tomatoes and a vinegar-oil dressing taste good with it.