Peel and wash the potatoes and cut into large cubes. Mix in a bowl with sweet paprika, salt, pepper and 100 ml oil. Distribute on a baking tray. Roast in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) for about 1 hour until golden brown. Take out and let cool down.
Clean, wash and finely dice the peppers. Peel garlic and dice finely. Clean, seed, wash and chop the chilli. Leek onions clean, wash and cut into fine rings. Wash herbs and chop finely.
Whisk vinegar, salt, pepper and 1 pinch of sugar. Fold in 8 tbsp. oil. Mix with potatoes, paprika, chilli, spring onions and herbs.
Season yoghurt with pepper. Season the salad to taste and spread the yoghurt on top.