Let the butter brown in a pan with a high rim. Add 20 g of the flour, salt and vegetable stock and also brown a little, then add the milk and stir with a whisk until everything comes off the pan in a lump.
Take the pan off the heat, let it cool down a bit and then add the egg and nutmeg and work in with a wooden spoon. Now gradually work in the remaining flour until a sticky, tough dough is formed, if necessary add additional flour or egg to achieve the right consistency.
When the dough is tough and sticky, cut off small dumplings with a wet teaspoon and add them to the simmering soup. When the dumplings float on top they are good and ready to be served.