Wash and clean the carrots, leaving some of the greenery to stand. Cover the carrots and cook them in 3/8 litres of boiling salted water for 5-8 minutes. Add peas, cook for another 5 minutes and drain. Collect the vegetable water. Meanwhile wash parsley and chives, dab dry and chop finely, except for a little bit for garnishing.
Bring 1/2 litre salted water to the boil. Remove from the heat, add milk, stir in puree flakes and half of the herbs. Add 10 g fat and leave to stand for 1 minute. Stir the puree well again, season to taste with nutmeg and keep warm. Mix 15 g fat and flour. Stir into the hot vegetable water and simmer for 1-2 minutes while stirring. Peel onions and cut into fine rings. Heat the remaining fat in a large pan. Fry slices of sausage and onion for 3-4 minutes while turning. (During this process the sausage slices bend upwards like nests at the edges.) Arrange the sausage slices and vegetables on 4 plates.
Stir into the hot vegetable water and simmer for 1-2 minutes while stirring. Peel onions and cut into fine rings. Heat the remaining fat in a large pan. Fry slices of sausage and onion for 3-4 minutes while turning. (During this process the sausage slices bend upwards like nests at the edges.) Arrange the sausage slices and vegetables on 4 plates. Put the mashed potatoes in a piping bag with a large star-shaped spout and spray a thick tuff on each sausage slice. Sprinkle with onions and remaining herbs and serve garnished