Preheat oven (electric cooker: 200 °C/circulating air: 180 °C/gas: see manufacturer). Pat meat dry and season with salt, pepper and paprika. Mix ketchup and Worcester sauce.
Oil a fat pan (deep baking tray). Place the meat on top and spread with the ketchup mixture. Roast in a hot oven for about 50 minutes.
Wash the potatoes thoroughly and cook covered in water for about 20 minutes. Roast almonds in a pan without fat while stirring for about 3 minutes. Peel garlic and chop finely. Wash parsley, shake dry and chop finely. Mix parsley, almonds, garlic, 2 tbsp. water and sour cream. Season to taste with salt and pepper.
Drain the potatoes, press flat, spread around the meat and brush with 4 tablespoons of oil. Bake for the last 20 minutes. Take the finished roast out of the oven, wrap in aluminium foil and let it rest for about 5 minutes. Arrange roast, potatoes and dip.