Wash the potatoes and cook in plenty of boiling salted water for 15-20 minutes. In the meantime, clean and wash the peppers and cut them into small cubes. Wash the chives and, except for a few longer tips for garnishing, cut into small rolls.
Peel and finely chop the onion. Mix curd, cream and mustard until smooth. Stir in prepared vegetables. Season to taste with salt, pepper and paprika. Leave to stand for a while. Drain and peel the potatoes. Serve with matie on plates.