Peel the kohlrabi and cut it in bite-sized pieces. Fill a bowl with some water and the juice of half a lemon. Put the kohlrabi in the bowl and put it on the side. Cut the carrots as well in cubes.
Chop the onion in small pieces and press the garlic. Put three tablespoons of olive oil into a pan and steam the onion and garlic over medium heat.
Add the flour and breafly sweat it. Stir well so no lumps will be formed.
Add the carrots as well and keep steaming. After ca. two minutes take the kohlrabi cubes out of the water and mix it into the pan.
Add the juice of half a lemon, 200ml water and the orange juice. Stir properly so that the roux start to thicken. Add salt and sugar cube into the pan and cook it for ca.
Drip three tablespoons of olive oil over the finisthed meal. Chop a little dill and spread it over the portions. Serve it cold or warm.