Peel and finely chop the onion. Knead the ground fat, egg, breadcrumbs and chopped onion. Season with salt and pepper. Form small balls from it. Heat the oil. Fry the meatballs for about 5 minutes.
Take it out. Sweat flour in the frying fat, add tomato paste. Add cream while stirring constantly, bring to the boil. Season to taste with salt and pepper. Heat pasta in boiling salted water for 1 minute.
Serve the sauce with the noodles and meatballs. Wash the chives and, except for a few longer tips for garnishing, cut into fine rolls. Noodle plate with Schn
Serve garnished with chive tips.