Peel the kohlrabi and carrots and use the vegetable slicer to cut into pens of the same size. Put some young leaves of the kohlrabi aside.
In a large saucepan, bring the vegetable stock with 1 lump of sugar, a little salt and a dash of vinegar to a boil. Cook the vegetable sticks in it for about 9 minutes until al dente. Drain the vegetables and in a sieve and collect the vegetable stock.
Peel the potatoes and cut them into small cubes and prepare them in an extra saucepan like boiled potatoes.
Fry the sausages heartily in a pan. Take out and cut into small pieces.
Now melt 10 g butter in a large saucepan, add 1 tablespoon flour and stir until smooth with a whisk. Gradually deglaze with the vegetable stock until the sauce has a creamy consistency. Season with salt and nutmeg.
Then add the vegetable sticks, the finished potato cubes and sausages and simmer briefly.
Finally sprinkle everything with a little young kohlrabi green.