Wash and boil the potatoes. Quench, peel and let cool
Knead 300 g flour, 1/2 tsp salt, vinegar, approx. 12 tbsp water and 60 g butter in pieces first with the dough hooks of the hand mixer, then quickly with your hands to form a smooth dough. Dust with flour, cover and let rest for at least 30 minutes
Peel garlic, wash herbs and chop everything finely. Mash the potatoes. Mix everything with curd. Season to taste with salt and pepper.
Roll out the dough onto some flour to a thickness of approx. 2 mm and cut out approx. 32 circles (10-12 cm Ø). Place about 1 tsp. of filling on each circle. Whisk the egg and brush the edges with it. Fold the dough over and press the edges together firmly
Portion by portion in boiling salt water 7-8 minutes allow to simmer. Lift out, drain well and keep warm. Melt 75-100 g butter. Wash the chives and chop finely. Arrange Kasnudel with butter and chives