Dab meat dry. Fry thoroughly all around in 2 tablespoons of hot oil. Season with salt and pepper. Roast on a fat pan in a preheated oven (electric cooker: 80 °C/circulating air and gas: not suitable) for approx. 4 hours
Wash the potatoes and cook covered for about 20 minutes. Quench, peel and let cool. Peel and finely chop the onion. Dice bacon as well
Stir sour cream and yoghurt until smooth. Wash, chop or finely chop the herbs. Clean and wash radishes and spring onions. Cut radishes into sticks, spring onions into fine rings. Put some vegetables and herbs aside for sprinkling. Stir the rest into the sour cream, season to taste
Fry the bacon in a large coated pan until crispy. Fry the onion. Remove everything. Heat 1-2 tablespoons of oil in the bacon fat. Cut potatoes into slices and fry in portions until golden brown, season. Add onion and bacon. Slice roast beef, arrange with dip and fried potatoes. Sprinkle with rest of vegetables etc.
Drink: cold beer