Cut the onion and bacon into fine cubes, fry in a pan, turning often until the bacon is crispy.
Cut white bread into very thin slices and toast in the toaster until light yellow and crispy.
Clean the leek, cut into fine rings and wash. Bring to the boil once with the meat stock. Add parsley, season with marjoram and nutmeg.
Spread the bread in soup bowls or on deep plates and sprinkle with the bacon and onion mixture. Pour the soup over it and add 1 tablespoon of cream to each.