Peel onion and garlic and chop finely. Knead both with the mince, breadcrumbs, egg and mustard. Season with salt, pepper, paprika and cumin. Shape the dough into 12-16 rolls.
Heat oil in a pan. Fry the mince rolls for about 8 minutes, turning them several times.
Beat the yogurt and starch until smooth. Wash the mint and pick off the leaves. Cut the mint into strips except for a few leaves for garnish. Clean and wash the spring onions and cut into rings.
Take the meat rolls out of the pan and keep warm. Pour the yoghurt into the pan, add the mint strips and bring to the boil briefly. Season to taste with salt and pepper. Arrange the meat rolls and sauce. Sprinkle with spring onions and mint leaves. This goes well with salad and flatbread.