Shape the ingredients into plum-sized dumplings. Bring the meat stock to a boil, add the dumplings, reduce the heat and let it steep for about 10 minutes.
Sieve the stock, collect 0.4 l.
Prepare a sauce from butter, flour (roux), milk and broth, season with salt, pepper, melt the horseradish in it, add a dash of cream.
Add the dumplings to the sauce again and let stand for 5 minutes over low heat.