Peel and finely chop the onion. Peel the garlic and press it through a garlic press. Knead minced meat, breadcrumbs, egg, salt, pepper, cumin, paprika, mustard, onion and garlic.
Form 12-16 longish meatballs from the minced dough. Heat the oil in a pan and fry the meatballs for about 8 minutes, turning them over at low heat. In the meantime, stir yoghurt and starch until smooth.
Wash the mint, dab dry and pluck the leaves from the stalk. Cut the leaves into fine strips, except for a few for garnishing. Clean and wash the spring onion and cut into rings. Remove meatballs from the pan and keep warm.
Put yoghurt into the pan, add mint, bring to the boil briefly and season with salt and pepper. Arrange the meatballs with the sauce in a dish and serve sprinkled with leek and onion rings and the remaining mint leaves.
Mixed salad tastes good with it.