Clean and wash the Brussels sprouts and cook in 1/8 litre salt water for about 15 minutes. Drain the brussels sprouts and collect the vegetable water. Melt the fat. Add flour and mix. Add the sprout water and milk bit by bit.
and mix well. Bring the sauce to the boil once and let it swell at a mild heat for about 10 minutes. Season to taste with salt, pepper and nutmeg. Peel the sausage and cut into small cubes. Slightly fry in a pan without fat.
Bring 1/8 litre of water to the boil, remove from the heat and stir in the puree flakes. Fold 2/3 of the sausage into the puree. Arrange puree with Brussels sprouts and sauce on a plate. Sprinkle with the remaining sausage.
Garnish with parsley leaves.